1. Eulerian circuits of 4–valent graphs imbedded in surfaces;Las Vergnas,1978
2. On Eulerian partitions of graphs;Las Vergnas,1979
3. Remarkable valuation of the dichromatic polynomial of planar multigraphs;Martin;J. Comb. Theory, Ser. B,1978
4. On the principal edge tripartition of a graph;Rosenstiehl;Ann. Discrete Math.,1978