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2. Finding Hamiltonian paths in nonrectangular grid graphs;Everett,1986
3. Hamilton cycles in product graphs;Göbel;Technische Hogeschool Twente Memorandum Nr. 268,1979
4. On the number of Hamilton cycles in product graphs;Göbel;Technische Hogeschool Twente Memorandum Nr. 289,1979
5. Hamilton paths in grid graphs;Itai;SIAM J. Comput.,1982