Notes: Dated "1988" but last paper in this issue was accepted for publication 29 March 1989.
Notes: Signed for printing ("podpisano k pechati") 20 March 1992, but actually published in 1993 (Radchenko, pers. comm.).
Notes: Not seen. Citation from Radchenko (pers. comm.). Signed for printing ("podpisano k pechati") 12 July 1989, but actually published in 1990.