Published in Sida, Contributions To Botany, in 1997, in volume 17, issue 4, pages 809-827

Created: 2015-12-02, modified: 2015-12-02

Published in Acta Botánica Mexicana, in 1995, in volume 30, pages 13-20

Created: 2016-12-02, modified: 2017-04-27