Geodesic
Which circle bundles can be triangulated over $\partial\Delta^3$?
Zapiski Nauchnykh Seminarov POMI, Representation theory, dynamical systems, combinatorial methods. Part XXIX, Tome 468 (2018), pp. 75-81 
N. E. Mnëv. Which circle bundles can be triangulated over $\partial\Delta^3$?. Zapiski Nauchnykh Seminarov POMI, Representation theory, dynamical systems, combinatorial methods. Part XXIX, Tome 468 (2018), pp. 75-81. http://geodesic.mathdoc.fr/item/ZNSL_2018_468_a6/
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

We prove that having the boundary of the standard three-dimensional simplex $\partial\Delta^3$ as the base of a triangulation, one can triangulate only trivial and Hopf circle bundles.

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