1. A survey of algorithms for the generalized assignment problem;Cattrysse;Eur. J. Oper. Res.,1992
2. I.R. de Farias, A polyhedral approach to combinatorial complementarity problems, Ph.D. Thesis, School of Industrial and Systems Engineering, Georgia Institute of Technology, Atlanta, GA, 1995.
3. A generalized assignment problem with special ordered sets: a polyhedral approach;de Farias;Math. Programming,2000
4. Computers and Intractability: A Guide to the Theory of NP-Completeness;Garey,1979
5. The generalized assignment problem: valid inequalities and facets;Gottlieb;Math. Programming,1990