@article{05141431,
title = {Hopf bifurcation with },
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {63},
year = {2006},
pages = {127-155},
zbl = {1113.37033},
language = {en},
url = {http://dml.mathdoc.fr/item/05141431}
}
Dias, Ana Paula S.; Paiva, Rui C. Hopf bifurcation with . Portugaliae Mathematica. Nova Série, Tome 63 (2006) pp. 127-155. http://gdmltest.u-ga.fr/item/05141431/