12-14 January 2000; presenting an oral paper to the "International Conference of Jellyfish Blooms", Alabama, USA
9-14 April 1999; presenting an oral paper to the "4th Workshop of the European Concerted Action on Ballast Water",
Llandudno, UK.
22-29 September 1997; presenting an oral paper to the "4th International Marine Biotechnology Conference
(IMBC 97)", Sorrento, Paestum, Capo Rizzuto, Otranto, Pugnochiuso, Italy.
15 - 19 June 1997; presenting an oral paper to the "NATO TU-Black Sea Project: Symposium on Scientific Results"
Crimea, Ukraine.
27 May - 6 June 1996; participating a NATO - ASI course on "Harmful Algal Blooms", Bermuda Biological Station for Research, Bermuda.
5 December 1995 - 4 January 1996; together with Drs C. Craig and P. Gaffney, research on the genetical relatedness of Black Sea Mnemiopsis to that in the western Atlantic, University of Delaware, USA.
20-24 March 1995; presenting a talk at the UNEP-GESAMP Working Group 35 on "Opportunistic settlers and the problem of Mnemiopsis leidyi in the Black Sea", in Geneva, Switzerland.
25-28 October 1994; presenting a talk at the meeting of 'Working Group on Resources Assessment, Modeling and Surveys - Black Sea GEF Programme' in
Constantza, Romania.
28 August - 9 September 1994; participating a NATO advanced study course on 'Molecular ecology of aquatic microbes' in Tuscany, Italy.
29 August - 10 September 1993; participating an advanced studies course on 'Biogeochemical Processes in Estuarine and Shelf Seas' in Plymouth, U.K.
30 September - 3 October 1992; participating in the BORDOMER 92 (International Convention on the Rational Use of Coastal Zone) in Bordeaux, France.
26 - 28 March 1991; presenting an oral paper to the First EMINar (European Marine Interdisciplinary Network),
Texel, Holland.
October 1988 - January 1992; studying on the ecology of benthos (particularly gastropods) at the Port Erin Marine Laboratory of the Isle of Man, UK.
October - November 1988; identification of phytoplankton (particularly diatoms) under the supervision of Prof. A.D. Boney of Glasgow University, Scotland.