@article{RSMUP_1981__65__277_0,
     author = {Moauro, Vinicio},
     title = {Bifurcation of closed orbits from a limit cycle in $R^2$},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {277--291},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {65},
     year = {1981},
     mrnumber = {653301},
     zbl = {0486.34025},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1981__65__277_0/}
}