Ellis L. Johnson George L. Nemhauser Martin W. P. Savelsbergh Progress in Linear Programming-Based Algorithms for Integer Programming: An Exposition. 2-23 2000 12 INFORMS J. Comput. 1 https://doi.org/10.1287/ijoc.12.1.2.11900 db/journals/informs/informs12.html#JohnsonNS00