J. L. Bravo, M. Fernández, A. Gasull. Limit Cycles for Some Abel Equations Having Coefficients without Fixed Signs. I. J. Bifurcation and Chaos, 19(11):3869-3876, 2009. [doi]
@article{BravoFG09,
title = {Limit Cycles for Some Abel Equations Having Coefficients without Fixed Signs},
author = {J. L. Bravo and M. Fernández and A. Gasull},
year = {2009},
doi = {10.1142/S0218127409025195},
url = {http://dx.doi.org/10.1142/S0218127409025195},
researchr = {https://researchr.org/publication/BravoFG09},
cites = {0},
citedby = {0},
journal = {I. J. Bifurcation and Chaos},
volume = {19},
number = {11},
pages = {3869-3876},
}