@article{1183499110, author = {Sanders, S. T.}, title = {Derived sets and their complements}, journal = {Bull. Amer. Math. Soc.}, volume = {42}, number = {12}, year = {1936}, pages = { 577-584}, language = {en}, url = {http://dml.mathdoc.fr/item/1183499110} }
Sanders, S. T. Derived sets and their complements. Bull. Amer. Math. Soc., Tome 42 (1936) no. 12, pp. 577-584. http://gdmltest.u-ga.fr/item/1183499110/