@article{ZNSL_1991_193_a4,
     author = {I. V. Itenberg},
     title = {Rigid isotopy classification of the curves of degree 6 with a non-degenerate singular point},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {72--89},
     publisher = {mathdoc},
     volume = {193},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1991_193_a4/}
}