$a Discrete optinization I : proceedings of the Advanced Research Institute on Discrete Optimization and Systems Applications of the Systems Science Panel of NATO and of the Discrete Optimization Symposium co-sponsored by IBM Canada and SIAM / ed. by P. L. Hammer, E. L. Johnson, B. H. Korte. - Amsterdam, 1979.
670
$a Kp. Pseudo-Boolean programming and applications / Petru L. Ivănescu. - Berlin, 1965. $b (Inst. of Mathematics, Romanian Academy of Sciences, Bucharest)
670
$a Kp. Pseudo-Boolean methods for bivalent programming / P. L. Ivănescu, S. Rudeanu. - Berlin, 1966.
670
$a Boolean methods in operations research and related areas / Peter L. Hammer (Ivănescu), Sergiu Rudeanu. - Berlin [etc.], 1968.
