@article{SM_1996_187_9_a0,
     author = {S. V. Gonchenko},
     title = {Moduli of $\Omega$-conjugacy of two-dimensional diffeomorphisms with a~structurally unstable heteroclinic contour},
     journal = {Sbornik. Mathematics},
     pages = {1261--1281},
     publisher = {mathdoc},
     volume = {187},
     number = {9},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1996_187_9_a0/}
}