@article{1102991727, author = {Gray, Neil R.}, title = {Unstable points in the hyperspace of connected subsets.}, journal = {Pacific J. Math.}, volume = {23}, number = {3}, year = {1967}, pages = { 515-520}, language = {en}, url = {http://dml.mathdoc.fr/item/1102991727} }
Gray, Neil R. Unstable points in the hyperspace of connected subsets.. Pacific J. Math., Tome 23 (1967) no. 3, pp. 515-520. http://gdmltest.u-ga.fr/item/1102991727/