AnGuo Dong Lin Gao XiaoFeng Zhou HongYu Su An Algebra Approach for Finding Frequent Subgraphs with Hamiltonian Cycle. 288-292 2007 FSKD (3) http://dx.doi.org/10.1109/FSKD.2007.138 conf/fskd/2007-3 db/conf/fskd/fskd2007-3.html#DongGZS07