APA

Bagrov V. G., Samsonov B. F., Shapovalov A. V. & Shirokov I. V.Commutative subalgebras of three first-order symmetry operators and separation of variables in the wave equation. : .

Chicago

Bagrov V G, Samsonov B F, Shapovalov A V and Shirokov I V.Commutative subalgebras of three first-order symmetry operators and separation of variables in the wave equation. : .

Harvard

Bagrov V. G., Samsonov B. F., Shapovalov A. V. and Shirokov I. V.Commutative subalgebras of three first-order symmetry operators and separation of variables in the wave equation. : .

MLA

Bagrov V G, Samsonov B F, Shapovalov A V and Shirokov I V.: . .