@article{RM_1990_45_2_a3,
     author = {Yu. S. Ilyashenko},
     title = {Finiteness theorems for limit cycles},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {129--203},
     publisher = {mathdoc},
     volume = {45},
     number = {2},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1990_45_2_a3/}
}