Poincaré in the archives - two examples
Philosophia Scientiae, Conférences du Séminaire d'Histoire des Mathématiques Heidelberg-Nancy-Strasbourg (1995-1996), Tome 2 (1997) no. 3, pp. 27-39. 
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Gray, Jeremy. Poincaré in the archives - two examples. Philosophia Scientiae, Conférences du Séminaire d'Histoire des Mathématiques Heidelberg-Nancy-Strasbourg (1995-1996), Tome 2 (1997) no. 3, pp. 27-39. http://www.numdam.org/item/PHSC_1997__2_3_27_0/

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