Published in Cr Ac Sci, in 1904, in volume 138, pages 824-825

Published in Cr Ac Sci, in 1904, in volume 138, pages 1529-1531

Published in Cr Ac Sci, in 1904, in volume 139, pages 371-373

Published in Cr Ac Sci, in 1904, in volume 139, pages 613-615

Published in Cr Ac Sci, in 1904, in volume 139, pages 645-646

Published in Cr Ac Sci, in 1904, in volume 141, pages 1268-1269