@article{IVM_1980_8_a5,
     author = {Yu. T. Kuzmenko},
     title = {Martin's boundary for elliptic operators in $R^n$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {39--45},
     year = {1980},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1980_8_a5/}
}