@article{SM_1971_14_4_a3,
     author = {L. A. Kalyakin},
     title = {Galerkin's method for equations with a~small parameter in the highest order derivatives},
     journal = {Sbornik. Mathematics},
     pages = {525--536},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_14_4_a3/}
}