@article{10_4153_CMB_1969_015_9,
     author = {Behzad, M. and Mahmoodian, S. E.},
     title = {On {Topological} {Invariants} of the {Product} of {Graphs}},
     journal = {Canadian mathematical bulletin},
     pages = {157--166},
     year = {1969},
     volume = {12},
     number = {2},
     doi = {10.4153/CMB-1969-015-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-015-9/}
}