@article{1183510405, author = {Clarkson, J. A.}, title = {A property of derivatives}, journal = {Bull. Amer. Math. Soc.}, volume = {53}, number = {12}, year = {1947}, pages = { 124-125}, language = {en}, url = {http://dml.mathdoc.fr/item/1183510405} }
Clarkson, J. A. A property of derivatives. Bull. Amer. Math. Soc., Tome 53 (1947) no. 12, pp. 124-125. http://gdmltest.u-ga.fr/item/1183510405/