@article{RM_1985_40_5_a5,
     author = {P. M. Elizarov},
     title = {Orbital topological classification of analytic differential equations in the neighbourhood of a degenerate elementary singularity},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {227--228},
     publisher = {mathdoc},
     volume = {40},
     number = {5},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1985_40_5_a5/}
}