$1!Bs!1Y'C-!Cd!Be'a,'U<!0d!5'!:~'X}!D:s - $1'=G'[~'Prs ($1!04K7os $1!Fd'V<!0d!FM!3K!JH!Nas, 2004)
Keywords: $1'a,'1L!X$'0X!Bs'A|'C-!Cd'CI!5=s