1. Note sur les ordres totaux à distance minimum d'une relation binaire donnée;Barbut;Math. Sci. Humaines,1966
2. Algorithms, Graphs and Computers;Bellman,1970
3. Some results about the number of jumps in acircuit digraphs;Chaty;Utilitas Math., Cong. Num.,1974
4. Ordered matchings and matchings without alternating cycles in bipartite graphs;Chaty;Utilitas Math.,1979
5. Sur le nombre de sauts d'une forět;Chein;C.R. Acad. Sci. Paris,1972