@article{RM_2002_57_5_a11,
     author = {I. A. Pushkar'},
     title = {Limit cycles generated by perturbations of {Hamiltonian} systems},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1002--1004},
     publisher = {mathdoc},
     volume = {57},
     number = {5},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2002_57_5_a11/}
}