V. M. Bobrov, V. M. Kukhtin, V. M. ChekshinVant. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1983. No.3. С. 44-49.
V. M. Bobrov, V. M. Kukhtin, F. M. ChekshinVANT. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1986. No.3. С. 31-34.
V. M. Bobrov, V. M. Kukhtin, V. М. ChekshinVANT. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1988. No.3. С. 17-20.