@article{DAN_1985_285_1_a1,
     author = {A. B. Vasil'eva and V.T. Volkov},
     title = {Periodic solutions of a singularly perturbed equation of parabolic},
     journal = {Doklady Akademii Nauk},
     pages = {15--19},
     publisher = {mathdoc},
     volume = {285},
     number = {1},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_285_1_a1/}
}