Klaus Jansen, Stefano Leonardi, Vijay V. Vazirani (Eds.):
Approximation Algorithms for Combinatorial Optimization, 5th International Workshop, APPROX 2002, Rome, Italy, September 17-21, 2002, Proceedings.
Lecture Notes in Computer Science 2462 Springer 2002, ISBN 3-540-44186-7 
Yuval Rabani:
Search and Classification of High Dimensional Data.
1-2
R. Ravi:
Bicriteria Spanning Tree Problems.
3-4
Alexander A. Ageev:
Improved Approximation Algorithms for Multilevel Facility Location Problems.
5-13
data released under the ODC-BY 1.0 license
