(3OhQ GFeI Ggd GdHjJ Ydjge GdSdGe aj GdMjGI GdGSdGejI (B: s (3OQGSI JMdjdjI Yf MjGI hLgGO GdGFeI GdGKfj YTQ (B((3Y(B) / s - (3GdGOjH, YGOd, s ((3eTgO, GjQGf (B: s (3eLeY GdHMhK GdGSdGejI, (B408 (3g`(B. = [1988]s, 1988)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B200-204.s
Keywords: (3Ggd HjJ GdQShd Ydjge GdSdGe (B((3TjYI(B)s; (3GdGSdGe hGdSjGSI (B((3TjYI(B)s