A. A. Samarsky , S. A. Gaifullin, A. V. Zakharov, N. V. Zmitrenko, V. Ya. Karpov, A. P. Mikhailov, T. V. MishchenkoVant. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1983. No.2. С. 38-42.
A. V. Kondrashenko, G. M. Mishchenko, T. G. Sevastianova, V. D. UrlinVANT. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1988. No.3. С. 64-70.