@article{ads-00121789,
author = {Varignon, Pierre},
title = {Solution de deux probl\`emes de g\'eom\'etrie},
journal = {HAL},
volume = {1712},
number = {0},
year = {1712},
language = {en},
url = {http://dml.mathdoc.fr/item/ads-00121789}
}
Varignon, Pierre. Solution de deux problèmes de géométrie. HAL, Tome 1712 (1712) no. 0, . http://gdmltest.u-ga.fr/item/ads-00121789/