@article{00697102, title = {Infinite products over visible lattice points.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {17}, year = {1994}, pages = {637-654}, doi = {10.1155/S0161171294000918}, zbl = {0811.05006}, language = {en}, url = {http://dml.mathdoc.fr/item/00697102} }
Campbell, Geoffrey B. Infinite products over visible lattice points.. International Journal of Mathematics and Mathematical Sciences, Tome 17 (1994) pp. 637-654. doi : 10.1155/S0161171294000918. http://gdmltest.u-ga.fr/item/00697102/