$1';1!K}'=*!5_!@,!<9s - $1#>]'BO'A?!Oz!UNs ($1!04K7o!9%!L}!O(!3"'CU!3K!JH!Nas, 1994)
Keywords: $1'=*!5_'Wl!1?(B; $1'=*!5_'XI'X8s