John Guckenheimer. Singular Hopf Bifurcation in Systems with Two Slow Variables. SIAM J. Applied Dynamical Systems, 7(4):1355-1377, 2008. [doi]
@article{Guckenheimer08,
title = {Singular Hopf Bifurcation in Systems with Two Slow Variables},
author = {John Guckenheimer},
year = {2008},
doi = {10.1137/080718528},
url = {http://dx.doi.org/10.1137/080718528},
researchr = {https://researchr.org/publication/Guckenheimer08},
cites = {0},
citedby = {0},
journal = {SIAM J. Applied Dynamical Systems},
volume = {7},
number = {4},
pages = {1355-1377},
}