Domination Graphs of Tournaments and Other Digraphs. - Deborah J. Bergstrand; Louis M. Friedler (Ars Comb., 2005)

The Independence Number of the Cartesian Product of Graphs. - Louis M. Friedler (Ars Comb., 2011)

Products of geodesic graphs and the geodetic number of products. - Louis M. Friedler; Rommy Márquez; Jake A. Soloff (Discuss. Math. Graph Theory, 2015)