Published in Bulletin De La Classe Des Science, Academie Royale De Belgique, in 1854, in volume 21, pages 23-112

Created: 2017-10-12, modified: 2017-10-12

Published in Bulletin de l'Académie Royale des Sciences de Belgique Classe des Sciences, in 1854, in volume 21, issue 2, pages 229-246

Created: 2017-10-18, modified: 2017-10-18