@article{SM_2014_205_10_a1,
     author = {V. Z. Grines and S. H. Kapkaeva and O. V. Pochinka},
     title = {A three-colour graph as a~complete topological invariant for gradient-like diffeomorphisms of surfaces},
     journal = {Sbornik. Mathematics},
     pages = {1387--1412},
     publisher = {mathdoc},
     volume = {205},
     number = {10},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2014_205_10_a1/}
}