E. E. Demekhin, A. M. Raigorodskii, O. I. Rubanov, “Distance graphs having large chromatic numbers and containing no cliques or cycles of a given size”, Mat. Sb., 204:4 (2013), 49–78; Sb. Math., 204:4 (2013), 508–538
A. M. Raigorodskii, O. I. Rubanov, “Distance Graphs with Large Chromatic Number and without Large Cliques”, Mat. Zametki, 87:3 (2010), 417–428; Math. Notes, 87:3 (2010), 392–402