Published in Anales De La Sociedad Cientifica Argentina, in 1992, in volume 222, pages 27-31

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

Published in Anales De La Sociedad Cientifica Argentina, in 1992, in volume 222, pages 41-50

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