1986/1-10, 12-18; 1988/1, 7, 8, 12; 1989/2, 4, 12, 13, 24, 26; 1990/1, 13, 17, 25; 1991/1, 8, 10, 12, 14, 16; 1992/1-8, 10, 12-14, 16-20, 23-25; 1993/2, 4, 6, 7, 9, 13, 14, 17, 18, 24, 25; 1994/1, 12, 21, 24;