@article{FPM_1997_3_2_a12,
     author = {V. G. Sushko},
     title = {Asymptotic representations of the solutions of some singularly perturbed problems for mixed type equations},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {579--586},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1997_3_2_a12/}
}