@article{MMO_1978_37_a2,
     author = {A. S. Pyartli},
     title = {Cycles of a~system of two complex differential equations in the vicinity of a~stationary point},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {95--106},
     publisher = {mathdoc},
     volume = {37},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1978_37_a2/}
}