@article{articlefc26f143,
title   = {Bifurcations in a class of polycycles involving two saddle-nodes on a Möbius band},
author = {Pessoa, Claudio and Sotomayor, Jorge},
year = {2009},
doi = {10.1007/s12346-008-0018-x},
journal   = {Qualitative Theory of Dynamical Systems}
}