Weak approximation and non-abellian fundamental groups
Annales scientifiques de l'École Normale Supérieure, Série 4, Tome 33 (2000) no. 4, pp. 467-484. 
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Harari, D. Weak approximation and non-abellian fundamental groups. Annales scientifiques de l'École Normale Supérieure, Série 4, Tome 33 (2000) no. 4, pp. 467-484. doi : 10.1016/s0012-9593(00)00118-x. http://www.numdam.org/articles/10.1016/s0012-9593(00)00118-x/

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