@article{JTNB_2011__23_2_489_0,
     author = {Ravi Vakil and Kirsten Wickelgren},
     title = {Universal covering spaces and fundamental groups in algebraic geometry as schemes},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {489--526},
     publisher = {Soci\'et\'e Arithm\'etique de Bordeaux},
     volume = {23},
     number = {2},
     year = {2011},
     doi = {10.5802/jtnb.774},
     mrnumber = {2817942},
     zbl = {1228.14019},
     language = {en},
     url = {https://jtnb.centre-mersenne.org/articles/10.5802/jtnb.774/}
}