Popescu, Elena. “Least Squares Problem for Linear Inequalities With Bounds on the Variables”. Rev. Anal. Numér. Théor. Approx. 33, no. 2 (August 1, 2004): 229–235. Accessed April 15, 2025. https://ictp.acad.ro/jnaat/journal/article/view/2004-vol33-no2-art15.