@article{SM_1986_54_1_a6,
     author = {E. M. Landis and N. S. Nadirashvili},
     title = {Positive solutions of second order elliptic equations in unbounded domains},
     journal = {Sbornik. Mathematics},
     pages = {129--134},
     publisher = {mathdoc},
     volume = {54},
     number = {1},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1986_54_1_a6/}
}