$1!Bs!Ci!1Y'U<!0#!4W!<e!5=s - $1!04K7o!Na'CZ!O(':`!^z![k!0s!5=KN7!ON!?us ($1!04K7o!Na'CZ!O(':`!3K!JH!Nas, 1992)
Keywords: $1!04K7o'KG!0s!5=(B; $1!FMK7o!5=(B--$1!04!Bs'?n-J;s