@article{RSMUP_1987__78__237_0,
     author = {Sabatini, Marco},
     title = {Hopf bifurcation from infinity},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {237--253},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {78},
     year = {1987},
     mrnumber = {934515},
     zbl = {0644.34037},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1987__78__237_0/}
}