$1'Uq!0m!N(!AAKNgs - $1!G('_.!+5'1L'b3!+5!=>!Cy!+5!0a'23s ($1!04!3(!04!9*'bo!DC!3K!JH!Nas, 1994)
Keywords: $1'Uq!0m!N('2F'X<s