1. |
I. L. Kovalenko, L. Yu. Lenivtseva, A. I. Litvin, S. D. Simonzhenkov, “Application of an implicit variational-gradient method to the Dirichlet problem for the Helmholtz equation”, Zh. Vychisl. Mat. Mat. Fiz., 35:4 (1995), 611–615 ; Comput. Math. Math. Phys., 35:4 (1995), 483–486 |