@article{1255380674, author = {Fort, M. K.}, title = {Mappings on $S^{1}$ into one-dimensional spaces}, journal = {Illinois J. Math.}, volume = {1}, number = {1}, year = {1957}, pages = { 505-508}, language = {en}, url = {http://dml.mathdoc.fr/item/1255380674} }
Fort, M. K. Mappings on $S^{1}$ into one-dimensional spaces. Illinois J. Math., Tome 1 (1957) no. 1, pp. 505-508. http://gdmltest.u-ga.fr/item/1255380674/