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Langevin, A., & Soumis, F. (1989). Design of multiple-vehicle delivery tours satisfying time constraints. Transportation Research Part B: Methodological, 23(2), 123-138. Lien externe
Langevin, A., Soumis, F., & Desrosiers, J. (1989). Classification of Traveling Salesman Problem Formulations. (Rapport technique n° G-88-36). Lien externe
