Hypo-matchings in Directed Graphs
edited by: Adrian Bondy, Jean Fonlupt, Jean-Luc Fouquet, Jean-Claude Fournier, JorgeL Ramírez Alfonsín
We give a common generalization of results on hypo-matchings given in a sequence of papers by G. Cornuéjols, D. Hartvigsen and W. Pulleyblank in [2, 3, 4, 5] and results on even factors given by W.H. Cunningham and J.F. Geelen in  and by the author and L. Szegő in .