no. 1
The ziqqurath of exact sequences of n-groupoids
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 52 (2011) no. 1, article no. 1, 43 p. 
@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},
     year = {2011},
     publisher = {Andr\'ee CHARLES EHRESMANN},
     volume = {52},
     number = {1},
     zbl = {1242.18005},
     language = {en},
     url = {https://www.numdam.org/item/CTGDC_2011__52_1_2_0/}
}
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Kasangian, S.; Metere, G.; Vitale, E.M. The ziqqurath of exact sequences of n-groupoids. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 52 (2011) no. 1, article  no. 1, 43 p.. https://www.numdam.org/item/CTGDC_2011__52_1_2_0/

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