@article{SM_1986_53_1_a1,
     author = {N. V. Kislov},
     title = {Nonhomogeneous boundary value problems for differential-operator equations of mixed type, and their application},
     journal = {Sbornik. Mathematics},
     pages = {17--35},
     publisher = {mathdoc},
     volume = {53},
     number = {1},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1986_53_1_a1/}
}