Published in Bulletin de la Societe Philomathique, in 1881, in volume 5, pages 88-90

Created: 2013-05-20, modified: 2013-05-20

Published in Bulletin de la Societe Philomathique, in 1881, in volume 5, pages 90-91

Created: 2013-05-20, modified: 2013-05-20

Published in Bulletin de la Société philomathique de Paris, in 1881, in volume 5, pages 95-100

Created: 2012-01-12, modified: 2012-01-12