$1'KG'2W':`'T2!BX':`s - $1'7a!1A!JY(B. R. $1!DU!=&!@9!UN(B; $1!5t';2'YFs ($1!C%'`[!BX'V1!3K!JH!Nas, 1988)
Keywords: $1!BM!BX!+9'_9'Oy!+5!Bs'X<s