Kazuhisa Makino Masafumi Yamashita Tiko Kameda Max- and Min-Neighborhood Monopolies. 513-526 http://link.springer.de/link/service/series/0558/bibs/1851/18510513.htm 2000 conf/swat/2000 SWAT db/conf/swat/swat2000.html#MakinoYK00