@article{CRMATH_2005__340_11_833_0,
     author = {Chaperon, Marc and L\'opez de Medrano, Santiago},
     title = {On the {Hopf} bifurcation for flows},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {833--838},
     publisher = {Elsevier},
     volume = {340},
     number = {11},
     year = {2005},
     doi = {10.1016/j.crma.2005.04.006},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2005.04.006/}
}