@article{GDZPPN002333589,
title = {The principal degenerations of abelian surfaces and their polarisations.},
journal = {Mathematische Annalen},
volume = {287},
year = {1990},
pages = {281-308},
zbl = {0715.14034},
url = {http://dml.mathdoc.fr/item/GDZPPN002333589}
}
Weintraub, Steven H.; Hulek, Klaus. The principal degenerations of abelian surfaces and their polarisations.. Mathematische Annalen, Tome 287 (1990) pp. 281-308. http://gdmltest.u-ga.fr/item/GDZPPN002333589/