@article{SM_1995_83_1_a3,
     author = {V. S. Medvedev and E. L. Fedorov},
     title = {On dynamical systems close to {Hamiltonian} with separatrix loops of a~saddle},
     journal = {Sbornik. Mathematics},
     pages = {79--91},
     publisher = {mathdoc},
     volume = {83},
     number = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_83_1_a3/}
}