1. A note on reducing a system to a single equation;Anthonisse;Mathematisch Centrum, BN 1/70 Amsterdam,1970
2. Aggregation of a class of systems of integer-valued equations;Babayev;Zh. vychist. Mat. mat. Fiz.,1978
3. Transformation of integer programs to knapsack problems;Bradley;Discrete Math.,1971
4. On the treatment of stock cutting problems as diophantine programs;Elmagrahby,1971
5. New results on equivalent integer programming formulations;Glover;Math. Programming,1975