$1!<j!_D!M"'Kg!8W(B. $1KGa!Be!M"!0-!L,s - $1!L$!_Q!Oz'Q[!UNs ($1!04K7o!5w!<c!3K!JH!Nas, 1993)
Keywords: $1'2z!Og!N#'Y<s