@article{GDZPPN002093219, title = {On the Bifurcation of Maps of the Interval}, journal = {Inventiones mathematicae}, volume = {41}, year = {1977}, pages = {165-178}, zbl = {0354.58013}, url = {http://dml.mathdoc.fr/item/GDZPPN002093219} }
Guckenheimer, J. On the Bifurcation of Maps of the Interval. Inventiones mathematicae, Tome 41 (1977) pp. 165-178. http://gdmltest.u-ga.fr/item/GDZPPN002093219/