@article{RM_1986_41_1_a17,
     author = {A. A. Shcherbakov},
     title = {On~complex limit cycles of the equation $\dfrac{dw}{dz}=\dfrac{P_n}{Q_n}$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {243--244},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1986_41_1_a17/}
}