@article{DAN_1969_188_3_a8,
     author = {L. D. Pokrovskii},
     title = {The {Dirichlet} problem for pseudodifferential equations which depend on a parameter},
     journal = {Doklady Akademii Nauk},
     pages = {528--531},
     publisher = {mathdoc},
     volume = {188},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_188_3_a8/}
}