Jae-Ha Lee Chan-Su Shin Jae-Hoon Kim Sung Yong Shin Kyung-Yong Chwa New Competitive Strategies for Searching in Unknown Star-Shaped Polygons. 427-429 1997 Symposium on Computational Geometry http://doi.acm.org/10.1145/262839.263062 db/conf/compgeom/compgeom97.html#LeeSKSC97