Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_2000_14_3-4_a1, author = {A. Serbetchi}, title = {On the {Liftings} to the {Sheaf} of {Triad} {Homotopy} {Groups}}, journal = {Mathematica balkanica}, pages = {209}, publisher = {mathdoc}, volume = {14}, number = {3-4}, year = {2000}, url = {http://geodesic.mathdoc.fr/item/MABA_2000_14_3-4_a1/} }
A. Serbetchi. On the Liftings to the Sheaf of Triad Homotopy Groups. Mathematica balkanica, Tome 14 (2000) no. 3-4, p. 209. http://geodesic.mathdoc.fr/item/MABA_2000_14_3-4_a1/