@article{DE_1979_15_2_a14,
     author = {B.-W. Schulze},
     title = {Over- and under-determined elliptic boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {321--326},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_2_a14/}
}