@article{01598720, title = {On the Freyd categories of an additive category.}, journal = {Homology, Homotopy and Applications}, volume = {2}, year = {2000}, pages = {147-185}, zbl = {1066.18008}, language = {en}, url = {http://dml.mathdoc.fr/item/01598720} }
Beligiannis, Apostolos. On the Freyd categories of an additive category.. Homology, Homotopy and Applications, Tome 2 (2000) pp. 147-185. http://gdmltest.u-ga.fr/item/01598720/