Skatulla S, Sansour C. Essential boundary conditions in meshfree methods via a modified variational principle. Applications to shell computations. Comp. Assist. Methods Eng. Sci. [Internet]. 2022 Jul. 22 [cited 2025 Jun. 22];15(2):123-42. Available from: https://cames.ippt.pan.pl/index.php/cames/article/view/752