Petrus Patricius. Some aspects of his life and career. [Acts of the 16th International Eirene Conference, Prague August-September 1982, volume 5, Byzantinological Symposium, ( Prague 1985), p. 48-53.
Petrus Patricius. The Byzantine Diplomat, Official and Author. [Historical Monographs 7], Athens 1990, reviewed by D. Feissel in Revue des Etudes Byzantines 51 (1993), p.263.] (text in Greek, extensive summary in English.)
The less obvious ends of Byzantine diplomacy. [Byzantine Diplomacy], papers from the twenty-fourth spring symposium of Byzantine studies, Cambridge , March 1990, London 1992, p. 315-319.
Was King Theodahad's accession to the throne ever recognised by Justinian? [Dodone 19], (1990), p. 173-186.
The flow of information in mediaeval historiography. [Dodone 20] (1991) p. 95-112.
Byzantium, the Magyar raids and their consequences. [Byzantinoslavica 54/2], 1993, p254-267.
Two important observations on friar Richard's Relatio. (Text in Greek, Summary in English.) [Dodone 21], 1991, p87-95.
Emperor Constantine VII Porphyrogennetus and the Hungarians. [Historical Monographs 17], Athens 1997. (Text in Greek, extensive summary in English.)
The employment of new technology for the needs of scholars in the humanities, who face visual problems. [Pleroforia, issues 1/2, 1996/1997 (in Greek.)
Byzantine diplomacy before A.D 1000. [Journal of East Central Europe 26/2] 1999, p1-13.
Byzantium and Hungary: A course of five centuries. [Volume of lectures held at the Society of Friends of the Byzantine Museum of Ioannina, I], 1996-1997, Ioannina 2000, p13-28.
Byzantium: contacts with East Central Europe, [Volume dedicated to Miltos Garides, 1926-1996.] Ioannina 2003, Vol . 1 , p. 55-60.
Panagiotis Antonopoulos – Charalambos Dendrinos , The Eastern Roman Empire at the Turn of the First Millenium, [Europe around the Year 1000], ed. P. Urbanczyk (Institute of Archaeology and Ethnology), Polish Academy of Sciences: Warsaw, 2001, p. 167-203.
Epirus in the early Christian centuries, [Lectures of the Friends of the Byzantine Museum of Ioannina, II], Ioannina, 2004. (Text in Greek, published as individual brochure.)
King Cunincpert and the archangel Michael. [Die Langobarden: Herrschaft und Identität], Vienna, 2005, p. 383-86.
Palaeography for the blind: Autopia? [Rinascimento Virtuale, La rete dei palimsesti Greci], Ravenna , Nov. 2003, (published on cd-rom.)
A structural program of assistance for visually impaired Graduate Students, so that they can follow the Interdisciplinary Postgraduate Program in Mediaeval Studies of the University of Ioannina . [Atoma me anapiries stin tritovathmia ekpedefsi=People with disabilities in tertiary education], Kritiki Publishers, Athens 2003, p. 240-243. (In Greek.)
Panagiotis G. Antonopoulos – Panagiotis Con. Mangafas, Live witnesses of the fall of Constantinople in 1453: Four characteristic cases. [International Conference in the Context of the 9th Scientific Forum on Greece , Constantinople 550 years since the Fall.] Granada , 4-6 December 2003, Granada , 2006, Vol. 2, p. 41-51.
Byzantine Texts and their Place on the Net: A Bonus for the Community? [The International Mediaeval Congress], Leeds , July, 2000. (Augumented and presented in the 21st International Congress of Byzantine Studies, London , August-September 2006. (Published online at the time, but apparently withdrawn later.)
THE REIGN OF CUNINCPERT. SAGA, REALITY, STABILITY AND PROGRESS IN THE LOMBARD STATE OF Pavia AT THE END OF THE SEVENTH CENTURY, Porphyrogenitus Ltd., London, 2010. (his third book, written in English). Reviewed by Stefano Gasparri in The Bryan Mawr Maedieval Review (TMR) 11, 30/10/2011, and by C. P. Christou in Byzantina Symmeikta 21 (2011), 405- (in Greek).
Emperor Constans II's Intervention in Italy and its Ideological Significance, [BYZANTINE IDEOLOGY Between Roman Imperial and Christian Religion], (Akten des Internationalen Symposium (19.–21. Mai 2011) Edited by Johannes Koder und Ioannis Sturaitis, (ÖSTERREICHISCHE AKADEMIE DER WISSENSCHAFTEN PHILOSOPHISCH-HISTORISCHE KLASSE Denkschriften, 452. BAND XXX), (Wien 2012), p. 27-32.