@article{MMO_1982_44_a6,
     author = {V. A. Naǐshul'},
     title = {Topological invariants of analytic and area-preserving mappings and their application to analytic differential equations in $\mathbf C^2$ and $\mathbf{CP}^2$},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {235--245},
     publisher = {mathdoc},
     volume = {44},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1982_44_a6/}
}