- .. . . . , 1980 . , N4555.
- .. . . , . , 1984 . , N4005.
- .. . . , . , 1984 . , N4533.
- .. . . , . , 1988 . , N5124.
- . . . , . , 1986 . , N4714.
- . . . . , 1978 . , N3500.
- . . . " " N17. ., , 1982, . 97-98.
- . . - . " " N22. ., , 1987, . 95-103.
- . , . , . . , . " " N24. ., , 1989, . 123-130.