@article{SVMO_2020_22_1_a4,
     author = {A. I. Morozov and O. V. Pochinka},
     title = {Combinatorial invariant of {Morse-Smale} diffeomorphisms on surfaces with orientable heteroclinic},
     journal = {\v{Z}urnal Srednevol\v{z}skogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {71--80},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SVMO_2020_22_1_a4/}
}