Published in Anales De La Sociedad Cientifica Argentina, in 1989, in volume 219, pages 15-35

Created: 2016-02-12, modified: 2016-02-12

Published in Anales De La Sociedad Cientifica Argentina, in 1989, in volume 219, pages 37-47

Created: 2016-02-12, modified: 2016-02-12

Published in Anales De La Sociedad Cientifica Argentina, in 1989, in volume 219, pages 49-56

Created: 2016-02-12, modified: 2016-02-12