1. Unimodularity of the clar number problem;Abeledo;Linear Algebra Appl.,2007
2. On the forced matching numbers of bipartite graphs;Adams;Discrete Math.,2004
3. Forcing on perfect matchings–A survey;Che;MATCH Commun. Math. Comput. Chem.,2011
4. The Aromatic Sextet;Clar,1972
5. Kekulé Structures in Benzenoid Hydrocarbons;Cyvin,1988