Published in Anales De La Sociedad Cientifica Argentina, in 1950, in volume 149, pages 129-135

Published in Anales De La Sociedad Cientifica Argentina, in 1950, in volume 149, pages 245-253

Published in An Soc Cient Argentina, in 1950, in volume 149, issue 1, pages 22-32

Published in An Soc Cient Argentina, in 1950, in volume 149, issue 2, pages 52-75

Published in An Soc Cient Argentina, in 1950, in volume 149, issue 4, pages 157-177

Published in Anales De La Sociedad Cientifica Argentina, in 1950, in volume 150, pages 3-27