@article{IM2_1990_34_1_a0,
     author = {A. B. Antonevich},
     title = {Boundary value problems with strong nonlocalness for elliptic equations},
     journal = {Izvestiya. Mathematics},
     pages = {1--21},
     year = {1990},
     volume = {34},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1990_34_1_a0/}
}