Dupont, Luis A., and Rafael H. Villarreal. “Edge Ideals of Clique Clutters of Comparability Graphs and the Normality of Monomial Ideals”. Mathematica Scandinavica 106, no. 1 (March 1, 2010): 88–98. Accessed September 8, 2026. https://journals.msp.org/mscand/article/view/571.