Approximation algorithms for integer covering problems via greedy column generation Y. Crama; J. Van De Klundert — 1994 RAIRO - Operations Research - Recherche Opérationnelle
Product form parametric representation of the solutions to a quadratic boolean equation Y. Crama; P. L. Hammer; B. Jaumard; B. Simeone — 1987 RAIRO - Operations Research - Recherche Opérationnelle