@article{DE_1976_12_1_a14,
     author = {V. I. Pa\v{s}kovskii},
     title = {Connected operators and boundary value problems for equations of elliptic type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {118--128},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_1_a14/}
}