1. Finding k points with minimum diameter and related problems;Aggarwal;J. Algorithms,1991
2. Network Flows: Theory, Algorithms and Applications;Ahuja,1993
3. Introduction to Mathematical Techniques in Pattern Recognition;Andrews,1972
4. Improved approximation guarantees for minimum weight k-trees and prize-collecting salesmen;Awerbuch,1995
5. How to allocate network centers;Bar-Ilan;J. Algorithms,1993