@article{SM_1972_18_4_a5,
     author = {M. A. Shifrin},
     title = {The rate of decrease of solutions of elliptic equations},
     journal = {Sbornik. Mathematics},
     pages = {621--634},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_18_4_a5/}
}