(3WQb JOQjS GdJQHjI GdQjGVjI aj GdeQMdI GdGSGSjI (B: (3GdJQHjI GdMQcjI s - (3GdOjQj , Ydj(B, s; (3GdOjQj , Ydjs ((3eDSSI MeGOI ddOQGSGJ GdLGeYjI hGdfTQ hGdJhRjYs, 1999)
1