Ilya Baran Erik D. Demaine Optimal adaptive algorithms for finding the nearest and farthest point on a parametric black-box curve. 220-229 2004 conf/compgeom/2004 Symposium on Computational Geometry http://doi.acm.org/10.1145/997817.997852 db/conf/compgeom/compgeom2004.html#BaranD04