@article{DAN_1995_342_5_a4,
     author = {D. V. Turaev and L. P. Shilnikov},
     title = {Blue sky catastrophes},
     journal = {Doklady Akademii Nauk},
     pages = {596--599},
     publisher = {mathdoc},
     volume = {342},
     number = {5},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_342_5_a4/}
}