Morozov, V., Tokarev, N. and Lezhnev, V. (2012) “A variational problem for the biharmonic equation”, Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie), 13(33), pp. 409–412. Available at: https://en.num-meth.ru/index.php/journal/article/view/536 (Accessed: 23 April 2024).