The following publications are possibly variants of this publication:
- Approximating the 3-period Incremental Knapsack ProblemFederico Della Croce, Ulrich Pferschy, Rosario Scatamacchia. jda, 52:55-69, 2018. [doi]
- Approximating Multiobjective Knapsack ProblemsThomas Erlebach, Hans Kellerer, Ulrich Pferschy. mansci, 48(12):1603-1612, 2002. [doi]
- Approximating the product knapsack problemUlrich Pferschy, Joachim Schauer, Clemens Thielen. ol, 15(8):2529-2540, 2021. [doi]