1991PROCEEDINGS OF THE WORKSHOP ON RELATIVISTIC HEAVY ION PHYSICS AT PRESENT AND FUTURE WORKSHOP ON RELATIVISTIC HEAVY ION PHYSICS AT PRESENT AND FUTURE ACCELERATORS , BudapestBudapest, Hungary, 17 Jun 1991 - 21 Jun 19911991-06-171991-06-21KFKI PREPRINT/REPORT SERIES 28,34-42 (1991)1991