@article{CTGDC_2011__52_1_2_0,
     author = {Kasangian, S. and Metere, G. and Vitale, E.M.},
     title = {The ziqqurath of exact sequences of n-groupoids},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     eid = {1},
     pages = {2--44},
     publisher = {Andr\'ee CHARLES EHRESMANN},
     volume = {52},
     number = {1},
     year = {2011},
     zbl = {1242.18005},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_2011__52_1_2_0/}
}