@article{TAC_2004_13_a4,
     author = {A.R. Garzon and H. Inassaridze and A. del Rio},
     title = {Derivations of categorical groups},
     journal = {Theory and applications of categories},
     pages = {86--105},
     publisher = {mathdoc},
     volume = {13},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2004_13_a4/}
}