1. M. L. Balinski, Fixed-Cost Transportation Problems, Naval Research Logistics Quarterly 8 (1961), 41–54.
2. R. S. Barr, F. Glover und D. Klingman, Enhancements of Spanning Tree Labelling Procedures for Network Optimizations, INFOR 17 (1) (1979), 16–34.
3. R. S. Barr, F. Glover und D. Klingman, A New Optimization Method for Large Scale Fixed Charge Transportation Problems, Operations Research 29 (3) (1981), 448–463.
4. D. P. Bertsekas und P. Tseng, RELAXT-III: A New and Improved Version of the RELAX Code, Report P-1990, Laboratory for Information and Decision Systems, Massachusetts Institute of Technology, Cambridge, Massachusetts, Juli 1990.
5. K. Boenchendorf, Combining Penalties for the Fixed-Charge Transportation Problem, Methods of Operations Research 53 (1986), 231–237.