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- Grothendieck , A. ( 1984 ). Esquisse d'un Programme. In “Geometric Galois Actions” (L. Schneps, P. Lochak, eds.) Vol. 1 “Around Grothendieck's Esguisse d'un Programme.” London Math Soc. Lecture Notes Series. Cambridge Univ. Press, 1997, Vol. 242, 5–48 (English version, same volume, 243–284) .
- Communicated by A. Turull.