@article{SM_2015_206_3_a1,
     author = {A. V. Arutyunov and B. D. Gel'man},
     title = {On the structure of the set of coincidence points},
     journal = {Sbornik. Mathematics},
     pages = {370--388},
     publisher = {mathdoc},
     volume = {206},
     number = {3},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2015_206_3_a1/}
}