| 27 March 1986 | - Rutherford Appleton Lab., U.K. | - C. Emson |
| 23-24 June 1986 | - Argonne Nat. Lab., U.S.A. | - L. Turner |
| 20-21 October 1986 | - Tokyo, Japan | - K. Miya |
| 18-19 November 1986 | - Ecole Centrale Lyon, France | - A. Nicola |
| 12-13 January 1987 | - Georgia Inst. of Technology, U.S.A. | - K. Davey |
| 20-21 August 1987 | - Tech. University Graz, Austria | - L. Turner |
| 18-19 July 1988 | - Univ. of British Columbia - Vancuver, Canada | - L. Turner |
| 5-7 October 1988 | - Univ. of Salerno, Capri, Italy | - R. Albanese |
| Baltimore | - Univ. of Akronne, U.S.A. | - N. Ida |
| 20-21 March 1989 | - Edf Paris, France | - J. C. Verite |
| 11-12 September 1989 | - Univ. of Okayama, Japan | - T. Nakata |
| 23-26 April 1990 | - Oxford - RAL, U.K. | - J. Diserens |
| 10-12 October 1990 | - IGTE-TU Graz, Austria | - K. Richter |
| 25-26 October 1990 | - Toronto - ANL&Univ. of Chicago | - H. Sabbagh |
| 31 January - 1 February | - Sendai, Japan | - T. Takagi |
| 12-13 July 1991 | - Sorrento, Italy | - V. Cocorese |
| 16-19 March 1992 | - Grenoble, France | - A. Nicolas |
| 6-7 August 1992 | - Clairmont, California | - H. Sabbagh, SHR Hoole |
| 18-19 October 1992 | - Hngzhou, China | |
| 29-30 January 1993 | - Sapporo, Japan | - T. Honma |
| 5-6 November 1993 | - FIU Miami, U.S.A. | - O. Mohammed |
| 25 June 1994 | - Seoul, Koreea | - H. K. Jung |
| 7-8 July 1994 | - Aix-Les-Bains, France | - A. Bossavit |
| 14 July 1995 | - Berlin, Germany | - N. Ida |