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Han X, Landi G. On the gauge group of Galois objects.; 2020. Available from: https://arxiv.org/abs/2002.06097

Han X. Twisted Ehresmann Schauenburg bialgebroids.; 2020. Available from: https://arxiv.org/abs/2009.02764

Dubois-Violette M, Han X, Landi G. Principal fibrations over noncommutative spheres. Reviews in Mathematical Physics [Internet]. 2018  ;30:1850020. Available from: https://arxiv.org/abs/1804.07032