@article{IVM_1984_9_a9,
     author = {N. N. Tarkhanov},
     title = {Calculation of the {Poincar\'e} index},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {47--50},
     publisher = {mathdoc},
     number = {9},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1984_9_a9/}
}