@article{IVM_1987_5_a3,
     author = {A. A. Grigor'yan and N. S. Nadirashvili},
     title = {The {Liouville} theorems and exterior boundary value problems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {25--33},
     publisher = {mathdoc},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1987_5_a3/}
}