1. “A Non-Numerical Approach to Production Scheduling Problems,”;Akers;Operations Research,1955
2. “On an Integer Program for a Delivery Problem,”;Balinski;Operations Research,1964
3. “Graphic Solution of the Traveling Salesman Problem,”;Barachet;Operations Research,1957
4. Beenhakker , H. L. “Development of Alternate Criteria for Optimality in the Machine Sequencing Problem,” 1963
5. “Mathematical Aspects of Scheduling Theory,”;Bellman;J. of SIAM,1956