Computational experience with an algorithm for the lock box problem. - R. L. Bulfin; V. E. Unger (ACM Annual Conference, 1973)

The Group-Theoretic Structure in the Fixed-Charge Transportation Problem. - Jeffery L. Kennington; V. E. Unger (Oper. Res., 1973)

Technical Note - Surrogate Constraints and the Strength of Bounds Derived from 0-1 Benders' Partitioning Procedures. - Ronald L. Rardin; V. E. Unger (Oper. Res., 1976)

Some computationally relevant group theoretic structures of fixed charge problems. - Ronald L. Rardin; V. E. Unger (Math. Program., 1976)

Optimal Design of Regional Wastewater Systems: A Fixed-Charge Network Flow Model. - John J. Jarvis; Ronald L. Rardin; V. E. Unger; Richard W. Moore; Charles C. Schimpeler (Oper. Res., 1978)