1. Scarf, HE: Production sets with indivisibilities - Part I: generalities. Econometrica 49, 1-32 (1981)
2. Scarf, HE: Neighborhood systems for production sets with indivisibilities. Econometrica 54, 507-532 (1986)
3. Jünger, M, Liebling, TM, Naddef, D, Nemhauser, GL, Pulleyblank, WR, Reinelt, G, Rinaldi, G, Wolsey, LA: 50 Years of Integer Programming. Springer, Berlin (2010)
4. Garey, MR, Johnson, DS: Computers and Intractability: A Guide to the Theory of NP-Completeness. Freeman, San Francisco (1979)
5. Gomory, RE: Outline of an algorithm for integer solution to linear programs. Bull. Am. Math. Soc. 64, 275-278 (1958)