Congrese, Simpozioane, Colocvii internationale
1976: Al 2-lea Congres International de Tracologie, Romania
1976: Al 11-lea Congres International de studii asupra Frontierelor romane, Ungaria;
1980: Al 15-lea Congres International de stiinte istorice, Spania;
1983: Al 13-lea Congres International de studii asupra Frontierelor romane, Germania;
1989: Al 15-lea Congres International de studii asupra Frontierelor romane, Marea Britanie;
1990: Al 17-lea Congres International de stiinte istorice, Spania
1991: Al 7-lea Congres International de arheologie a navelor si corabiilor, Danemarca;
1995: Conferinta internationala cu tema The Roman Limes on the middle and Lower Danube, Iugoslavia;
1995: Al 18-lea Congres International de studii asupra Frontierelor romane, Olanda;
1996: A 3-a Conferinta Internationala cu tema “The lower Danube frontier in the 4th -6th centuries”, Romania;
1997: Al 7-lea Congres International de epigrafie greaca si romana, Italia.
1997: Al 7-lea simpozion international de istorie navala, SUA;
1997: Al 19-lea Congres International de studii asupra Frontierelor romane, Romania;
1997: A 4-a Conferinta internationala asupra frontierelor romane, Bulgaria;
2001: A 5-a Conferinta internationala asupra frontierelor romane, Bulgaria;
2002: Al 8-lea Al 7-lea Congres International de epigrafie greaca si romana, Spania;
2002: Al 17-lea Congres international de studii sud est europene, Grecia;
2002: Al 20-lea Congres International de studii asupra Frontierelor romane, Pecs
2003: Al 25-lea Congres International de stiinte istorice, Franta;
2005: Al 10-lea Congres international de Tracologie, Grecia
 

                Cărţi de autor

1987: Geto-dacii in istoria militara a lumii antice, Bucuresti, (in colaborare cu Al. Vulpe)
1988: Moesia Secunda. Scythia si Notitia Diqnitatum, Bucuresti.
1991: Fortificatia si asezarea romana tarzie de la Babadag-Topraichioi, Peuce X 1991 (in colaborare cu A Opait si Gh. Poenaru Bordea).
1996: Les forces navales au Bas-Danube: 1 ère - 6 ème siècles, Oxford (in colaborare cu O. Bounegru).
1996: The History of the Romanians, Bucharest (in colaborare cu M. Dogaru).
1997: The Fortifications of Lower Moesia (A.D.86 - 275), Amsterdam (in colaborare cu N. Gudea).
1997: The Lower Moesian Army in Northern Wallachia (A.D.101-118), Bucharest (in colaborare cu T. Dvorski)
2003: Halmyris I. Monografie arheologica. Cluj-Napoca (in colaborare cu Al. Suceveanu, Fl. Topoleanu, Gh. Poenaru Bordea)
2006: A History of a Later Roman Province. Scythia Minor 284-681, Amsterdam

                Enciclopedii, Dictionare

1997-2006: Lexicon of Greek and Roman Place-Names cca. 1500 B. C.-A. D. 500, Amsterdam (colaborare internationala) vol. 4-7.
1994-2000: Enciclopedia arheologiei si istoriei vechi a Romaniei, Bucuresti 9in colaborare)

                Volume omagiale

-Conjunctura internationala si ecouri ale bataliei de la Vaslui in lume medievala (in colaborare), in vol. Vaslui, Stefan cel Mare 1475, Vaslui, p. 89-97.
-O etapizare a originii si formarii poporului roman (in colaborare), in vol. Habitat 76. Studii si Comunicari. Bacau, 1976. Comisia Nationala Romana pentru UNESCO, p. 55-69.
-Apele in istoria asezarilor umane (in colaborare), in vol. Stralucirile apei, Slatina 1977. Comisia Nationala Romana pentru UNESCO, p. 71-79. Elemente de organizare militara pe teritoriul Romaniei in epoca Geto-daca si romana (pana in secolul III e.n.) in vol. File din istoria militara a poporului roman, 4, 1077, p.97-37.
-Organizarea militara a daco-getilor si romanilor pe teritoriul de azi al Romaniei. in vol. Istoria militara a poporului roman. Manual Academia Militara, Bucuresti, 1979, p.16-32.
-Note demografice din istoria teritoriului de astazi al Romaniei, in vol. Populatie, sanatate, educatie, mediu, Comisia Nationala a Romaniei, Deva, 1978, p. 67-87.
-La Guerre et les montagnes pendant l'Antiquite. in vol.La guerre e la montagne dans I'histoire des Romains, Bucharest, 1991, p. 45-68.
-The Basilica Episcopalis and the Martyr’s Tomb from Halmyria, Studia historica et Theologica, Iasi, 2003, p. 157-163 (in colaborare cu O. Bounegru)

                Studii de specialitate.

-Noi consideratii istorice asupra Scutului de la Dura-Europos, in SCIVA, 26,
1975, 4, p.507-520.
-Trupele de origine hispanica in Dacia, in SCIVA, 27, 1976,4, p.477-494
-Addenda et corrigenda, in SCIVA, 28, 1977,2, p.261-165.
-Suppllementum epigraphicum la trupele romane de origine hispanica in Dacia, I, Studii si Materaile de Muzeografie si Istorie Militara, 10, 1977, p.61-78; II in SMMIM, 11, 1978, p. 143-152.
-Constantini Dafnenses si Ballistarii Dafnenses in SCIVA, 28, 1977, 3, p.391-402.
-The Structure and Functioning of the Lower Danube limes in the 1st -3rd centuries A.D.- A Few Problems, in Akten des XI Internationaler Limeskongresses, Szekesfervar, 1976, Budapest, 1977
-Spre o tipoloqie a stampilelor legiunii a XI-a Claudia in Moesia Inferior, I in SMMIM 12, 1979, p.164-185; II, 13, 1980, p. 85-105 (in colaborare cu C.Museteanu si D. Elefterescu).
-Spanish Units in Roman Dacia, in Arhiva Espanol de Arqueologia, 53, 1980,
141-142, p. 61-76 (in colaborare cu N. Gudea).
-The Military Factor and the Daco-Roman Symbiosis, in vol. Army and the Romanian Society, Bucharest, 1980, p.44-65.
-Rolul factorului militar in simbioza Daco-Romana in vol.Armata si societatea rom€measca, Bucure~ti, 1980, p.42-63.
-Noi materiale arheologice din Romula, in SMMIM 13, 1980, p. 108-1 (in colaborare cu
Gh. Poenaru-Bordea).
-Noi descoperiri epigrafice pe limesul Dunarii de Jos, in Pontica, 14, 1981, p. 255-261 (in colaborare cu C. Museteanu si C. Chiriac).
-Santierul arheologic de la Independenta, in Materaile si Cercetari Arheologice, a XVI-a sesiune anuala de rapoarte, Vaslui, 1982, p. 180-186 (in colaborare cu Al. Suceveanu, A. Opait, C. Opait si F. Topoleanu)
-Contributii la istoria legiunii a XI-a Claudia la sfarsitul secolului II e.n., in SCIVA, 33,1982, 1, p. 47-62.
-Ammianus Marcel1inus (27, 4, 5), Zosimos (IV 10-11) si campania !ui Valens
impotriva gotilor din anul 367, in SCIVA, 34,1983, p. 57-70.
-Legio II Herculia, in Revue des Etudes Sud Est Europeennes, 21, 1983, p. 247-259
-Cetatea romano-bizantina de la Independenta (iud.Tulcea), in: Documente recent descoperite si informatii arheologice, Bucuresti, 1985, p.33-41.
-A New Late Roman Fortification on the Territory of Romania: the Burgus a1 Topraichioi, Tulcea county in Studien zu den Militar grenzen Roms III 13 Internationaler Limeskongress - Aalen, 1983, Stuttgart, 1986, p. 565-572 (in colaborare cu A. Opait)
-Un nouveau "Vicus" sur le territoire de la Dobrudja romaine, in Dacia N.S. 1986, 1-2, p. 109-120 (in colaborare cu Al. Suceveanu).
-Vexillation in northern Dobrudia, in Dacia NS, 30,1986, 1-2, p. 173-176.
-Early and late Roman Fortification at Independenta, Tulcea county, in N.S., 31,1987,1-2, p. 97-106 (in colaborare cu Al. Suceveanu, A. opait, C. Opait si F. Topoleanu).
-Tezaurul de inscriptii de la Independenta (in colaborare) in Documente rei descoperite si informatii arheologice, Bucuresti, 1986, p. 45-54.
-Du nom antique de la cite romaine et romaine tardive d'lndepenl (dep.Tulcea), in Dacia NS, 31, 1987, 1-2, p.87-96 (in colaborare cu Al. Suceveanu).
-Ripa legions XI Claudiae la sfarsitul secolului III si in secolului IV, in vol. Arta si. civilizatie la Dunarea de Jos, Calarasi, II, 1986, p.181-188.
-Fortificatia romana tarzie de la Bistret, judetul Dolj, Oltenia, V-VI, 1984-1986, p.29-40 (in colaborare cu Cr. M. Vladescu).
-An Early and Late Roman Fort on the Lower Danube Limes: Halmyris (Independenta, Tulcea County, Romania), Roman frontier Studies, Exeter 1989, p. 311-317
-Particular Traits of the Setting up and Development and Employment of the military Power on Romanian's Territory in the Geto-Dacian and Roman Epochs as well as during the chrystalization of the Romanian people, in: Roman Doctrine, Ideas and Conceptions, Bucharest, 1990, p.9-19.
-Burgul roman tarziu de la Babadaq-Topraichioi, jud Tulcea (in colaborare cu A. Opait). Peuce 12, 1991, p.33-249
- A note on Translucus (ND Or.XLlI 27), Starinar XLVII 1996, p. 249-251
-The Roman Frontier in Scythia Minor (1980-1994), Roman Limes on the Middle and Lower Danube, Belgrade, 1996, p. 223-234.
-The Late Roman Drobeta I. The Cruciform Building and the Fort Garrison in the 4th century A. D., Acta Musei Napocensis, 34, 1997, 1, p. 167-182.
-The Halmyris Tetrarchic Inscription, Zeitschrift fur Papyrologie und Epigraphik
119, 1997, p. 228-236.
-The Civitas and Castra on the Ripa Danubii in the 4th -6th centuries A. D., Late Roman and Early Byzantine Cities on the Lower Danube from the 4th to the 6th Century A.D., Poznan 1997, p. 9-12.
-The Tetrarchic Building Inscriptions and the Lower Danubian Limes, XI Congresso Internazionale di Epigrafia Greca e Latina, Roma 1997, Roma, p. 553-561
-The Tetrarchic Building Activity at the Lower Danube: I. Quadriburgia, in: Der Limes an der Unteren Donau von Diokletian bis Heraklios, Sofia, 1999, p. 3-16.
-The Roman Frontier in Scythia minor (1980-1995), proceedings of the XVIIth International Congress of Roman Frontier Studies, Zalau 1999, p. 199-213.
-Halmyris, a settlement and fort near the mouth of the Danube: interim report, Journal of Roman Archaeology 15, 2002, p. 231-245 (in colaborare cu M. K. Phelps).
-Milites Dacisciani qui iam saeviunt (HA, v.Gall. 12.3.4), Thraco-Dacica XXII 2002, p. 178-201 (in colaborare cu M. K. Phelps).