Published in Bulletin de la Société Philomathique, in 1877, in volume 1, pages 92-93

Published in Bulletin de la Societe Philomathique, in 1877, in volume 1, pages 115-118

Published in Bulletin de la Société Philomathique de Paris, in 1877, in volume 1, pages 175-197

Published in Bulletin de la Societe Philomathique, in 1877, in volume 11, pages 8-10