Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1957_112_5_a2, author = {Z. I. Biglov}, title = {An expansion in eigenfunctions of a system of second order differential equations}, journal = {Doklady Akademii Nauk}, pages = {797--799}, publisher = {mathdoc}, volume = {112}, number = {5}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_112_5_a2/} }
Z. I. Biglov. An expansion in eigenfunctions of a system of second order differential equations. Doklady Akademii Nauk, Tome 112 (1957) no. 5, pp. 797-799. http://geodesic.mathdoc.fr/item/DAN_1957_112_5_a2/