https://www.muni.cz/en/research/publications/1676696
On morphisms of crossed polymodules | Masaryk University | MUNI
masaryk universitymorphismscrossedmuni
https://edubirdie.com/docs/massachusetts-institute-of-technology/18-725-algebraic-geometry/114487-lecture-5-more-on-finite-morphisms-and-irreducible-varieties
Lecture 5: More on Finite Morphisms and Irreducible Varieties | Massachusetts Institute of...
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https://arxiv.org/abs/0808.3627
[0808.3627] Butterflies I: morphisms of 2-group stacks
Abstract page for arXiv paper 0808.3627: Butterflies I: morphisms of 2-group stacks
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https://arxiv.org/abs/2604.06320
[2604.06320] Factorizations of Moduli Morphisms and Universal Maps to Deligne-Mumford Stacks
Abstract page for arXiv paper 2604.06320: Factorizations of Moduli Morphisms and Universal Maps to Deligne-Mumford Stacks