- 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
