Duca, Eugenia, and Dorel I. Duca. “Optimization Problems and Second Order Approximated Optimization Problems”. Rev. Anal. Numér. Théor. Approx. 39, no. 2 (August 1, 2010): 107–121. Accessed December 25, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2010-vol39-no2-art2.