@article{1102947973, author = {Thomas, J. W.}, title = {A bifurcation theorem for $k$-set contractions.}, journal = {Pacific J. Math.}, volume = {49}, number = {2}, year = {1973}, pages = { 749-756}, language = {en}, url = {http://dml.mathdoc.fr/item/1102947973} }
Thomas, J. W. A bifurcation theorem for $k$-set contractions.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 749-756. http://gdmltest.u-ga.fr/item/1102947973/