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@article{PIM_1976_N_S_20_34_a15, author = {G. Hetzer and V. Stallbohm}, title = {Coincidence {Degree} {And} {Rabinowitz's} {Bifurcation} {Theorem}}, journal = {Publications de l'Institut Math\'ematique}, pages = {117 }, publisher = {mathdoc}, volume = {_N_S_20}, number = {34}, year = {1976}, url = {http://geodesic.mathdoc.fr/item/PIM_1976_N_S_20_34_a15/} }
G. Hetzer; V. Stallbohm. Coincidence Degree And Rabinowitz's Bifurcation Theorem. Publications de l'Institut Mathématique, _N_S_20 (1976) no. 34, p. 117 . http://geodesic.mathdoc.fr/item/PIM_1976_N_S_20_34_a15/