Flat circle bundles, pullbacks, and the circle made discrete.
Oprea, John ; Tanré, Daniel
International Journal of Mathematics and Mathematical Sciences, Tome 2005 (2005), p. 3487-3495 / Harvested from The Electronic Library of Mathematics
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Publié le : 2005-01-01
DOI : https://doi.org/10.1155/IJMMS.2005.3487
EUDML-ID : urn:eudml:doc:52523 
@article{05019301,
     title = {Flat circle bundles, pullbacks, and the circle made discrete.},
     journal = {International Journal of Mathematics and Mathematical Sciences},
     volume = {2005},
     year = {2005},
     pages = {3487-3495},
     doi = {10.1155/IJMMS.2005.3487},
     zbl = {1092.57019},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05019301}
}

Oprea, John; Tanré, Daniel. Flat circle bundles, pullbacks, and the circle made discrete.. International Journal of Mathematics and Mathematical Sciences, Tome 2005 (2005) pp. 3487-3495. doi : 10.1155/IJMMS.2005.3487. http://gdmltest.u-ga.fr/item/05019301/