@article{VMUMM_1987_4_a14,
     author = {V. I. Bakhtin},
     title = {The topological normal forms of metamorphoses of caustics of the series $\mathbf{D}_\mu$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {58--61},
     publisher = {mathdoc},
     number = {4},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1987_4_a14/}
}