(3GdYbhO GdTQYjI (B: s (3GdMGceI ddeYGedGJ GdeGdjI GdeYGUQI (B/ s - (3YHOg, YjSis ((3GdbGgQI (B: s (3OGQ GdCYJUGe, s, 1977)
Keywords: (3GdESdGe(B. s; (3Gdabg(B. s; (3GdeYGedGJ (B((3abg ESdGej(B). s; (3GdYbhO(B. s