@article{MZM_2001_70_6_a12,
     author = {A. P. Karmazin},
     title = {Parabolicity and {Hyperbolicity} {Conditions} for {Boundary} {Elements} of {Surfaces}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {948--951},
     publisher = {mathdoc},
     volume = {70},
     number = {6},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2001_70_6_a12/}
}