1. and (Ivanescu): On the Transportation Problem. Cahiers du Centre d'Etudes de Recherche Opérationnelle, Part I in 4, 1962, pp. 98–116;
2. part II in 4, 1962, pp. 131–160.
3. and : Private Communication. May 1970.
4. The bottleneck transportation problem
5. Time-minimizing transportation problems