1990/1-12; 1991/1-10; 1992/1-4; 1993/1-3, 5, 6; 1994/2-6; 1995/1-6; 1996/1-4; 1997/1, 3, 5, 6; 1998/1-5; 1999/1-4; 2000/1, 3-6