@article{GDZPPN002231549, title = {Symmetric Theta-Structures.}, journal = {Manuscripta mathematica}, volume = {70}, year = {1991}, pages = {67-92}, zbl = {0737.14013}, url = {http://dml.mathdoc.fr/item/GDZPPN002231549} }
Lange, H.; Birkenhake, Ch. Symmetric Theta-Structures.. Manuscripta mathematica, Tome 70 (1991) pp. 67-92. http://gdmltest.u-ga.fr/item/GDZPPN002231549/