@article{MT_2007_10_1_a5,
     author = {V. V. Dzhepko and Yu. G. Nikonorov},
     title = {The {Double} {Exponential} {Map} on {Spaces} of {Constant} {Curvature}},
     journal = {Matemati\v{c}eskie trudy},
     pages = {141--153},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2007_10_1_a5/}
}