BREŠAR, Boštjan, KLAVŽAR, Sandi in TEPEH, Aleksandra, 2008, On the geodetic number and related metric sets in Cartesian product graphs. Discrete mathematics [na spletu]. 2008. Vol. 308, no. 23, p. 5555–5561. [Dostopano 1 april 2025]. Pridobljeno s: http://dx.doi.org/10.1016/j.disc.2007.10.007