@article{TAC_2001_8_a14,
     author = {George Janelidze and M.Cristina Pedicchio},
     title = {Pseudogroupoids and commutators},
     journal = {Theory and applications of categories},
     pages = {408--456},
     publisher = {mathdoc},
     volume = {8},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2001_8_a14/}
}