Lupşa, Liana, Dorel I. Duca, and Eugenia Duca. “Equivalence Classes in the Set of Efficient Solutions”. Rev. Anal. Numér. Théor. Approx. 25, no. 1 (August 1, 1996): 127–136. Accessed November 22, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1996-vol25-nos1-2-art14.