@article{1028997960, author = {Bagemihl, F.}, title = {On power series, area, and length.}, journal = {Michigan Math. J.}, volume = {4}, number = {2}, year = {1957}, pages = { 281-283}, language = {en}, url = {http://dml.mathdoc.fr/item/1028997960} }
Bagemihl, F. On power series, area, and length.. Michigan Math. J., Tome 4 (1957) no. 2, pp. 281-283. http://gdmltest.u-ga.fr/item/1028997960/