APA

Bagrov V. G., Meshkov A. G., Shapovalov V. N. & Shapovalov A. V.Separation of variables in the Klein — Gordon equation. I. : .

Chicago

Bagrov V G, Meshkov A G, Shapovalov V N and Shapovalov A V.Separation of variables in the Klein — Gordon equation. I. : .

Harvard

Bagrov V. G., Meshkov A. G., Shapovalov V. N. and Shapovalov A. V.Separation of variables in the Klein — Gordon equation. I. : .

MLA

Bagrov V G, Meshkov A G, Shapovalov V N and Shapovalov A V.: . .