Alejandro López-Ortiz Sven Schuierer Searching and on-line recognition of star-shaped polygons. 66-88 2003 185 Inf. Comput. 1 http://dx.doi.org/10.1016/S0890-5401(03)00081-6 db/journals/iandc/iandc185.html#Lopez-OrtizS03