Published in Comptes Rendu de l'Academie des Sciences, Paris, in 1919, in volume 168, pages 666-669

Created: 2010-09-16, modified: 2023-02-16

Published in Comptes Rendus Hebdomadaires Des Seances De L'academie Des Sciences, Paris, in 1919, in volume 169, pages 1430-1432

Created: 2011-05-09, modified: 2023-02-16