1. Some results about the number of jumps in acircuit digraphs;Chaty;Utilitas Math.,1974
2. ordered matchings and matchings without alternating cycles in bipartite graphs;Chaty;Utilitas Math.,1979
3. Sur le nombre de sauts d'une forêt;Chein;C.R. Acad. Sci. Paris (A),1972
4. The jump number of dags and posets: an introduction;Chein;Annals Discrete Math.,1980
5. Nombre de sauts et graphes série-parallèles;Cogis;R.A.I.R.O. Inf. Théor.,1979