@article{IVM_1980_11_a2,
     author = {E. Z. Borevich},
     title = {Conditions for the topological equivalence of two-dimensional {Morse--Smale} diffeomorphisms},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {12--17},
     publisher = {mathdoc},
     number = {11},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1980_11_a2/}
}