• Cardamom : the genus Elettaria / edited by P. N. Ravindran and K. J. Madhusoodanan.. - London [a. o.] : Taylor and Francis, 2002. - XIV, 374 p.: ill. - ( Medicinal and aromatic plants - industrial profiles ;Vol. 30: ) . URL: http://www.e-streams.com/es0703/es0703_3094.html. URL: http://www.loc.gov/catdir/enhancements/fy0646/2002072378-d.html