@article{INTG_1984_16_a1,
     author = {M. O. Rahula},
     title = {Catastrophe theory and differential geometry},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {35--80},
     year = {1984},
     volume = {16},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1984_16_a1/}
}