@article{05636680,
title = {Algebraic categories whose projectives are explicitly free.},
journal = {Theory and Applications of Categories [electronic only]},
volume = {22},
year = {2009},
pages = {509-541},
zbl = {1187.18003},
language = {en},
url = {http://dml.mathdoc.fr/item/05636680}
}
Menni, Matías. Algebraic categories whose projectives are explicitly free.. Theory and Applications of Categories [electronic only], Tome 22 (2009) pp. 509-541. http://gdmltest.u-ga.fr/item/05636680/