@article{GDZPPN002042223, title = {The addition formula for theta functions.}, journal = {Aequationes mathematicae}, volume = {53}, year = {1997}, pages = {54-72}, zbl = {0881.39016}, url = {http://dml.mathdoc.fr/item/GDZPPN002042223} }
Bonk, Mario. The addition formula for theta functions.. Aequationes mathematicae, Tome 53 (1997) pp. 54-72. http://gdmltest.u-ga.fr/item/GDZPPN002042223/