@article{DAN_1970_193_1_a6,
     author = {E. M. Landis},
     title = {Theorems of {Phragm\'en--Lindel\"of} type for solutions of elliptic equations of high order},
     journal = {Doklady Akademii Nauk},
     pages = {32--35},
     publisher = {mathdoc},
     volume = {193},
     number = {1},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_193_1_a6/}
}