@article{SM_1995_83_2_a13,
     author = {S. I. Pidkuiko},
     title = {On the massiveness of the~set of nonintegrable {Hamiltonians}},
     journal = {Sbornik. Mathematics},
     pages = {515--532},
     year = {1995},
     volume = {83},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_83_2_a13/}
}