@article{BSMA_1877_2_1_1_337_1, author = {Borchardt, C.-W.}, title = {Sur la moyenne arithm\'etique-g\'eom\'etrique de quatre \'el\'ements}, journal = {Bulletin des Sciences Math\'ematiques et Astronomiques}, pages = {337--348}, publisher = {Gauthier-Villars}, volume = {2e s{\'e}rie, 1}, number = {1}, year = {1877}, language = {fr}, url = {http://archive.numdam.org/item/BSMA_1877_2_1_1_337_1/} }