Shapeev V, Belyaev V. Solving the biharmonic equation with high order accuracy in irregular domains by the least squares collocation method. Num. Meth. Prog. [Internet]. 2018 Dec. 24 [cited 2024 May 2];19(58):340-55. Available from: https://en.num-meth.ru/index.php/journal/article/view/978