Published in Anales De La Sociedad Cientifica Argentina, in 1920, in volume 89, pages 122-126

Published in Anales de la Sociedad Cientifica Argentina, in 1920, in volume 90, pages 33-43

Published in Anales de la Sociedad Cientifica Argentina, in 1920, in volume 90, pages 44-51

Published in Anales de la Sociedad Cientifica Argentina, in 1920, in volume 90, pages 52-72

Published in Anales de la Sociedad Científica Argentina, in 1920, in volume 90, pages 155-188