@article{MZM_1996_59_4_a7,
     author = {A. G. Losev},
     title = {On the hyperbolicity criterion for noncompact {Riemannian} manifolds of special type},
     journal = {Matemati\v{c}eskie zametki},
     pages = {558--564},
     publisher = {mathdoc},
     volume = {59},
     number = {4},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1996_59_4_a7/}
}