Cost analysis of interconnection networks. - Gabi Dreo; Niko Cizek; Bogomir Horvat; Viljem Zumer (Microprocessing and Microprogramming, 1991)

On the chromatic number of the lexicographic product and the Cartesian sum of graphs. - Niko Cizek; Sandi Klavzar (Discret. Math., 1994)