@article{MT_2012_15_1_a8,
     author = {Yu. G. Nikonorov},
     title = {Double exponential map on symmetric spaces},
     journal = {Matemati\v{c}eskie trudy},
     pages = {141--154},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2012_15_1_a8/}
}