Takeo Igarashi Satoshi Matsuoka Sachiko Kawachiya Hidehiko Tanaka Interactive Beautification: A Technique for Rapid Geometric Design. 105-114 1997 ACM Symposium on User Interface Software and Technology http://doi.acm.org/10.1145/263407.263525 db/conf/uist/uist1997.html#IgarashiMKT97