Since Balas and Zemel in the 1980s introduced the so-called core problem as an efficient tool for solving the Knapsack Problem, all the most successful algorithms have applied this concept. Balas and ...

Jae Sik Lee, Monique Guignard, An Approximate Algorithm for Multidimensional Zero-One Knapsack Problems -- A Parametric Approach, Management Science, Vol. 34, No. 3, Focussed Issue on Heuristics (Mar.