@article{GDZPPN002064413,
title = {Affin manifolds with nilpotent holonomy.},
journal = {Commentarii mathematici Helvetici},
volume = {56},
year = {1981},
pages = {487-523},
zbl = {0516.57014},
url = {http://dml.mathdoc.fr/item/GDZPPN002064413}
}
Fried, D.; Goldman, W.; Hirsch, M.W. Affin manifolds with nilpotent holonomy.. Commentarii mathematici Helvetici, Tome 56 (1981) pp. 487-523. http://gdmltest.u-ga.fr/item/GDZPPN002064413/