$1!;l!1W!0ms - $1!L$""c!S,!0$!Oz!UNs ($1!5@!D$!0d!FM!3K!JH!Nas, 1980)
Keywords: $1!Bs!Ci!BX':`(B--$1'_9'Oy(B; $1!Bs'X<(B; $1!BM!BXs