구입처 : 온라인 서점(최저가검색)..
http://www.mathought.com/bbs/board.php?bo_table=03_6&wr_id=396
http://www.mathought.com/bbs/board.php?bo_table=03_6&wr_id=230
Cake Number : n개 평면의 최대분할영역 개수(증명)