Increasing phytoene and B-carotene content in cassava roots by expression of an exognous phytoene synthase (CrtB) gene - Beltrán Giraldo, Jorge Alonso; Ladino Franco, Y.J.; Vacca, Orlando; López, D.; Arango Mejía, J.; Chávez, Alba L.; Al-Babili, S.; Beyer, Peter; Chavarriaga Aguirre, Paul; Tohme, Joseph M. (International Center for Tropical Agriculture, 2009)