@article{03717632, title = {Contributions to the theory of Hermitian series. III: Mean values.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {3}, year = {1980}, pages = {407-421}, doi = {10.1155/S0161171280000294}, zbl = {0458.30002}, language = {en}, url = {http://dml.mathdoc.fr/item/03717632} }
Hille, Einar. Contributions to the theory of Hermitian series. III: Mean values.. International Journal of Mathematics and Mathematical Sciences, Tome 3 (1980) pp. 407-421. doi : 10.1155/S0161171280000294. http://gdmltest.u-ga.fr/item/03717632/