$1!C\!>[!F)!C[ (B/ s - $1!;2!50s ($1!4c!@3!<D (B: s $1!4c!@3!Qd!BA!<r!BX!4H!;P(B, s, 2001)
$1!;2!50(B($1!;2'3k!BX(B)$1!3x!1?!<e!WO(B:$1'b^(B230-235s
$1!;2!50(B($1!;2'3k!BX(B)$1!3K!JH!1?!6-!MB!]t(B:$1'b^(B236-242s