Fast Algorithms for Computing the Smallest k-Enclosing Disc.

Sariel Har-Peled Soham Mazumdar Fast Algorithms for Computing the Smallest k-Enclosing Disc. 278-288 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2832&spage=278 2003 conf/esa/2003 ESA db/conf/esa/esa2003.html#Har-PeledM03