1. W. Dörfler and W. Imrich, Über das starke Produkt von endlichen Graphen, Österreich. Akad. Wiss., Mathem.-Natur. Kl. S.-B. II 178 (1969) 247–262.
2. Some Results on the Reconstruction of Graphs;Dörfler;Colloq. Math. Soc. János Bolyai,1973
3. J. Feigenbaum and A. A. Schäffer, Finding the prime factors of strong direct product graphs in polynomial time, Discrete Math. 109 (1992) 77–102.
4. An Algorithm for the Weak Reconstruction of Cartesian-product Graphs;Hagauer;J. Comb. Inf. Syst. Sci,1999
5. Product Graphs: Structure and Recognition;Imrich,2000