@article{MOMA_1984__98_178194,
     author = {J. Hofbauer and G. Iooss},
     title = {A {Hopf} {Bifurcation} {Theorem} for {Difference} {Equations} {Approximating} a {Differential} {Equation.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {99--114},
     publisher = {mathdoc},
     volume = {98},
     year = {1984},
     zbl = {0546.58037},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1984__98_178194/}
}