@article{00569406, title = {A generalized formula of Hardy.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {17}, year = {1994}, pages = {369-378}, doi = {10.1155/S0161171294000517}, zbl = {0795.05012}, language = {en}, url = {http://dml.mathdoc.fr/item/00569406} }
Campbell, Geoffrey B. A generalized formula of Hardy.. International Journal of Mathematics and Mathematical Sciences, Tome 17 (1994) pp. 369-378. doi : 10.1155/S0161171294000517. http://gdmltest.u-ga.fr/item/00569406/