@techreport{repORt:2026-2026—71,
	author = {A. Helber and E. M\"{u}hmer and F. Cicarelli},
	title = {The colored knapsack problem: structural properties and exact algorithms},
	institution = {Lehrstuhl f\"{u}r Operations Research, RWTH Aachen University},
	year = {2026},
	type = {repORt},
	number = {2026—71},
	month = {Feb},
	url = {https://www.or.rwth-aachen.de/files/research/repORt/colored_knapsack_problem_20260212.pdf}
}