Hopf bifurcation from infinity
Rendiconti del Seminario Matematico della Università di Padova, Tome 78 (1987), pp. 237-253. 
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     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://www.numdam.org/item/RSMUP_1987__78__237_0/}
}
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Sabatini, Marco. Hopf bifurcation from infinity. Rendiconti del Seminario Matematico della Università di Padova, Tome 78 (1987), pp. 237-253. http://www.numdam.org/item/RSMUP_1987__78__237_0/

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