Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1969_4_a14, author = {E. K. Timofeev}, title = {A~certain nonlinear boundary value problem}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {92--102}, publisher = {mathdoc}, number = {4}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1969_4_a14/} }
E. K. Timofeev. A~certain nonlinear boundary value problem. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1969), pp. 92-102. http://geodesic.mathdoc.fr/item/IVM_1969_4_a14/