@article{RM_1972_27_5_a1,
     author = {V. I. Arnol'd},
     title = {Lectures on bifurcations in versal families},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {54--123},
     publisher = {mathdoc},
     volume = {27},
     number = {5},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1972_27_5_a1/}
}