Al-Ayyoub, Ibrahim, Mehrdad Nasernejad, Kazem Khashyarmanesh, Leslie G. Roberts, and Veronica Crispin Quiñonez. “Results on the Normality of Square-Free Monomial Ideals and Cover Ideals under Some Graph Operations”. Mathematica Scandinavica 127, no. 3 (November 30, 2021). Accessed July 24, 2026. https://journals.msp.org/mscand/article/view/138.