@article{GDZPPN002197766,
title = {On the period classes of Prym differentials. I.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {316},
year = {1980},
pages = {153-171},
zbl = {0426.30038},
url = {http://dml.mathdoc.fr/item/GDZPPN002197766}
}
Gunning, R.C. On the period classes of Prym differentials. I.. Journal für die reine und angewandte Mathematik, Tome 316 (1980) pp. 153-171. http://gdmltest.u-ga.fr/item/GDZPPN002197766/