@article{GDZPPN002439387,
title = {The category of modules with good filtrations over a quasi-hereditary algebra has almost split sequences.},
journal = {Mathematische Zeitschrift},
volume = {207},
year = {1991},
pages = {209-224},
zbl = {0725.16011},
url = {http://dml.mathdoc.fr/item/GDZPPN002439387}
}
Ringel, Claus Michael. The category of modules with good filtrations over a quasi-hereditary algebra has almost split sequences.. Mathematische Zeitschrift, Tome 207 (1991) pp. 209-224. http://gdmltest.u-ga.fr/item/GDZPPN002439387/