$1'Ex!:m!F-!3V!Jd(B: $1'[2'JE!;O!_R!9'!Bd!8<'2Fs - $1'aw!?]!Bd!GE!9'!Bd!8<s ($1!H#!4c!BX'V1!3K!JH!Nas, 1992)
Keywords: $1!5E!0d'2F'X<s