@article{GDZPPN002231573,
title = {Hereditary endomorphism monoids of projective acts.},
journal = {Manuscripta mathematica},
volume = {70},
year = {1991},
pages = {133-144},
zbl = {0722.20049},
url = {http://dml.mathdoc.fr/item/GDZPPN002231573}
}
Knauer, Ulrich; Normak, Peter. Hereditary endomorphism monoids of projective acts.. Manuscripta mathematica, Tome 70 (1991) pp. 133-144. http://gdmltest.u-ga.fr/item/GDZPPN002231573/