Unit-distance graphs, graphs on the integer lattice and a Ramsey type result. K.B. Chilakamarri; C.B. Mahoney — 1996 Aequationes mathematicae
Unit-distance graphs, graphs on the integer lattice and a Ramsey type result. (Summary). K.B. Chilakamarri; Carolyn R. Mahoney — 1995 Aequationes mathematicae