Chartrand, G.; Frechen, J. B. On the chromatic number of permutation graphs. (English) Zbl 0199.59401 Proof Tech. Graph Theory, Proc. 2nd Ann Arbor Graph Theory Conf. 1968, 21-24 (1969). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 8 Documents Keywords:topology PDF BibTeX XML