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Kellogg S. Booth, George S. Lueker: Testing for the consecutive ones property, interval graphs, and graph planarity using PQ-tree algorithms. In: Journal of Computer and System Sciences. 13. Jahrgang, Nr.3, 1. Dezember 1976, ISSN0022-0000, S.335–379, doi:10.1016/S0022-0000(76)80045-1 (englisch, sciencedirect.com [abgerufen am 21. November 2015]).
P. C. Gilmore, A. J. Hoffman: A characterization of comparability graphs and of interval graphs. In: Canadian Journal of Mathematics. 16. Jahrgang, Nr.0, 1. Januar 1964, ISSN1496-4279, S.539–548, doi:10.4153/CJM-1964-055-5 (englisch, math.ca).
Kellogg S. Booth, George S. Lueker: Testing for the consecutive ones property, interval graphs, and graph planarity using PQ-tree algorithms. In: Journal of Computer and System Sciences. 13. Jahrgang, Nr.3, 1. Dezember 1976, ISSN0022-0000, S.335–379, doi:10.1016/S0022-0000(76)80045-1 (englisch, sciencedirect.com [abgerufen am 21. November 2015]).
D. R. Fulkerson, O. A. Gross: Incidence matrices and interval graphs. In: Pacific Journal of Mathematics. 15. Jahrgang, Nr.3, 1965, ISSN0030-8730, S.835–855 (englisch, projecteuclid.org).
C. Lekkeikerker, J. Boland: Representation of a finite graph by a set of intervals on the real line. In: Fundamenta Mathematicae. 1. Jahrgang, Nr.51, 1962, ISSN0016-2736, S.45–64 (englisch, infona.pl).