Published in Bulletin De La Classe Des Science, Academie Royale De Belgique, in 1873, in volume 35, pages 732-774

Created: 2017-03-14, modified: 2017-03-14

Published in Bulletin De La Classe Des Science, Academie Royale De Belgique, in 1873, in volume 36, pages 492-531

Created: 2017-10-11, modified: 2017-10-11