Jinhee Chun Kunihiko Sadakane Takeshi Tokuyama Linear Time Algorithm for Approximating a Curve by a Single-Peaked Curve. 6-15 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2906&spage=6 2003 conf/isaac/2003 ISAAC db/conf/isaac/isaac2003.html#ChunST03