@article{VMUMM_2019_3_a1,
     author = {I. M. Nikonov},
     title = {Description of degenerate two-dimensional singularities with single critical point},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {5--15},
     publisher = {mathdoc},
     number = {3},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2019_3_a1/}
}