@article{AA_2013_25_6_a6,
     author = {A. V. Smirnov},
     title = {Ptolemy spaces with strong inversions},
     journal = {Algebra i analiz},
     pages = {178--194},
     publisher = {mathdoc},
     volume = {25},
     number = {6},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2013_25_6_a6/}
}