1. Transformation of Euler Tours;Abrham;Ann. Discrete Math.,1980
2. Graphs, linear equations, determinants, and the number of perfect matchings;Al-Khnaifes,1990
3. Directed tree structure of the set of Kekulé structures of polyhex graphs;Chen;Chem. Phys. Lett.,1985
4. Handle bases and bounds on the number of subgraphs;Donald;J. Combin. Theory Ser. B,1987
5. H. Fleischner, Eulerian Graphs and Related Topics, Part 1, Vol. 1, Annals of Discrete Mathematics, Vol. 45, North-Holland, Amsterdam, 1990.