1978, held in Taormina, Italy (November 25-28), organized by P.Corsini
1983, held in Taormina, Italy (October 21-24), organized by P.Corsini
1985, held in Udine, Italy (October 15-18), organized by P.Corsini
1990, held in Xanthi, Greece (June 27-30), organized by T.Vougiouklis
1993, held in Iasi, Romania (July 4-10), organized by M.Stefanescu
1996, held in Prague, Czech Republic (September 1-7), organized by T.Kepca
1999, held in Taormina, Italy (June 13-19), organized by R.Migliorato
2002, held in Samothrace, Greece (September 1-9), organized by T.Vougiouklis
2005, held in Babolsar, Iran (September 1-7), organized by R.Ameri
2008, held in Brno, South Moravia, Czech Republic (September 3-9), organized by S.Hoskova
2011, held in Pescara, Italy (October 16-21), organized by A. Maturo
2014, held in Xanthi, Greece (September 2-7), organized by S. Spartalis
2017, held in Istanbul, Turkey (July 24-27), organized by B.A. Ersoy
2020, held in Iasi, Romania (June 22-24-Online), organized by V. Leoreanu-Fotea
2026, to be held in Manipal, India (June 30- July 03, 2026), organized by the School of Basic Sciences, Humanities and Management, MIT, MAHE, Manipal, India