@article{PDM_2015_2_a4,
     author = {M. N. Gornova and E. G. Kukina and V. A. Romankov},
     title = {Cryptanalysis of  {Ushakov--Shpilrain's} authentication protocol based on the twisted conjugacy problem},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {46--53},
     publisher = {mathdoc},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2015_2_a4/}
}