@article{05031808,
title = {Hopf bifurcation for the equation },
journal = {Divulgaciones Matem\'aticas},
volume = {13},
year = {2005},
pages = {35-43},
zbl = {1106.34047},
language = {en},
url = {http://dml.mathdoc.fr/item/05031808}
}
Acosta, Antonio; Lizana, Marcos. Hopf bifurcation for the equation . Divulgaciones Matemáticas, Tome 13 (2005) pp. 35-43. http://gdmltest.u-ga.fr/item/05031808/