Rachid El Jid. MLS Method: Numerical Error and Solution of a Unilateral Contact Problem Using Penalty and Lagrange Multiplier. Int. J. Math. And Appl. [Internet]. 2019 Mar. 15 [cited 2026 Jan. 30];7(1):121-36. Available from: http://ijmaa.in/index.php/ijmaa/article/view/274