@article{DE_1979_15_1_a2,
     author = {A. V. Borodin},
     title = {Differentiability with respect to the parameter of the solutions of nonlinear loaded boundary value problems for second-order partial differential {equations.~I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {18--25},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_1_a2/}
}