@inproceedings{delshams2016bifurcations,
	title={On bifurcations of homoclinic tangencies in area-preserving maps on non-orientable manifolds},
	author={Delshams, Amadeu and Gonchenko, Marina and Gonchenko, Sergey},
	booktitle={International Conference on Difference Equations and Applications},
	pages={107--125},
	year={2016},
	organization={Springer}
}