1. A unified approach to approximation algorithms for bottleneck problems;Hochbaum;J. ACM,1986
2. NIST, Definition of cloud computing v15, csrc.nist.gov/groups/SNS/cloud-computing/cloud-def-v15.doc
3. D.G. Andersen, Theoretical approaches to node assignment, 2002. http://www.cs.cmu.edu/?dga/papers/andersen-assign.
4. Approximation algorithms for disjoint paths problems;Kleinberg,1996
5. Improved approximation algorithms for unsplittable flow problems;Kolliopoulos,1997