(3OSJhQ GdCNdGb aj GdbQBf (B: s (3OQGSI ebGQfI ddCNdGb GdfXQjI aj GdbQGf (B/ s - (3OQGR, eMeO YHO Gddgs; (3TGgjf(B, (3YHO GdUHhQ s ((3GdchjJ (B: s (3OGQ GdHMhK GdYdejg, s, 1973)
Keywords: (3GdbQBf GdcQje(B.s; (3CdaGX GdbQBf(B.s; (3eYGfj GdbQBf(B.s; (3CMcGe GdbQBf(B.s