APA (7th ed.) Citation

Ferreira, C. E., Martin, A., & Weismantel, R. (1993). Facets for the multiple knapsack problem. ZIB.

Chicago Style (17th ed.) Citation

Ferreira, Carlos E., Alexander Martin, and Robert Weismantel. Facets for the Multiple Knapsack Problem. Berlin: ZIB, 1993.

MLA (9th ed.) Citation

Ferreira, Carlos E., et al. Facets for the Multiple Knapsack Problem. ZIB, 1993.