Sivakumar, Koratti Chengalrayan. “A Class of Singular Ro-Matrices and Extensions to Semidefinite Linear Complementarity Problems”. Yugoslav Journal of Operations Research 23, no. 2 (June 1, 2013): 163–172. Accessed August 26, 2025. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/357.