@article {Jorge_Orestes_Cerdeira_10812864,
	title = {When is a 0-1 knapsack a matroid ?},
	journal = {Portugaliae Mathematica 52 (1995) 475{\textendash}480},
	year = {1995},
	note = {n/a},
	abstract = {n/a},
	author = {Jorge Orestes Cerdeira}
}
