@article{AHL_2020__3__1_0, author = {Brion, Michel}, title = {On the fundamental groups of commutative algebraic groups}, journal = {Annales Henri Lebesgue}, pages = {1--34}, publisher = {\'ENS Rennes}, volume = {3}, year = {2020}, doi = {10.5802/ahl.25}, language = {en}, url = {https://ahl.centre-mersenne.org/articles/10.5802/ahl.25/} }