Published in Cr Acad Sci Paris, in 1922, in volume 174, pages 74-77

Published in Cr Acad Sci Paris, in 1922, in volume 174, pages 126-128

Published in Cr Acad Sci Paris, in 1922, in volume 174, pages 696-698

Published in Cr Acad Sci Paris, in 1922, in volume 174, pages 884-887

Published in Comptes rendus hebdomadaires des séances de l'Académie des sciences, in 1922, in volume 174, pages 913-917