@article{00650807,
title = {A new class of infinite products, and Euler's totient.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {17},
year = {1994},
pages = {417-422},
doi = {10.1155/S0161171294000591},
zbl = {0809.05010},
language = {en},
url = {http://dml.mathdoc.fr/item/00650807}
}
Campbell, Geoffrey B. A new class of infinite products, and Euler's totient.. International Journal of Mathematics and Mathematical Sciences, Tome 17 (1994) pp. 417-422. doi : 10.1155/S0161171294000591. http://gdmltest.u-ga.fr/item/00650807/