@article{UMJ_2016_2_2_a10,
     author = {Oleg Yu. Khachay and Pavel A. Nosov},
     title = {On some numerical integration curves for {PDE} in neighborhood of "butterfly" catastrophe point},
     journal = {Ural mathematical journal},
     pages = {127--140},
     year = {2016},
     volume = {2},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UMJ_2016_2_2_a10/}
}