@article{VMUMM_1997_4_a0,
     author = {A. D. Matros},
     title = {Asymptotic solution of a boundary value problem for a singularly perturbed equation of mixed type},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {3--7},
     publisher = {mathdoc},
     number = {4},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1997_4_a0/}
}