| A. Hilton , Reading University, Whiteknights, UK, Dec. 10-24, 1997 |
| A.E. Zalesskii , University of East Anglia, Nowich, UK, Dec. 10-24, 1997 |
| B. Poizat , Universite Claude Bernard, Villeurbanne, France, Oct. 12 - Nov. 26, 1997 |
| David Tskhakaya , Institute of Physics, Academy of Sciences of Georgia, Tbilisi, Georgia, Sep. 26 - Dec. 26, 1997 |
| O. Kavian , Universite de Versailles Saint-Quentin-en-Yvelines , Versailles Cedex, France, Aug. 23-26, 1997 |
| S. Zakeri , SUNY at Stony Brook, Stony Brook, USA, July 18 - Sep. 1, 1997 |
| M. Khoshkam , University of Saskatchewan, Saskatchewan, Canada, July 3 - Aug. 3, 1997 |
| M. Shahshahani , Stanford University, Stanford, USA, June 23 - Aug. 11, 1997 |
| Y. Ershov , Novosibirsk State University, Novosibirsk, Russia, June 23 - July 7, 1997 |
| F. Rezakhanlou , University of California, Berkeley, Berkeley, USA, May 28-29, 1997 |
| Nodar Tsintsadze , Institute of Physics Academy of Sciences of Georgia, Tbilisi, Georgia, Feb. 20-27, 1997 |
| H. Kharaghani , University of Lethbridge, Lethbridge, Canada, Jan. 9 - Aug. 11, 1997 |
| E.A. Palyutin , Novosibirsk State University, Novosibirsk, Russia, Oct. 1, 1996 - Jan. 1, 1997 |
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