A note on a two dimensional knapsack problem with unloading constraintsJefferson Luiz Moisés da Silveira, Eduardo Candido Xavier and Flávio Keidi MiyazawaRAIRO-Theor. Inf. Appl., 47 4 (2013) 315-324DOI: https://doi.org/10.1051/ita/2013037
