D. A.  Vaughan, ?4. Genepools of Genus Oryza?, in Monograph on genus Oryza, , Ed. Enfied, USA; Plymouth, UK: Science Publishers Inc, 2003, pp. 113-138.

D. A.  Vaughan, ?Appendix 1. Revised Key to Species in Genus Oryza?, in Monograph on Genus Oryza, , Ed. 2003.

S. D.  Sharma, ?Nomenclatural confusions in genus Oryza?, in  Monograph on Genus Oryza., , Ed. Science Publications Inc, 2003, pp. 353-357.

S. D.  Sharma, ?Species of Genus Oryza and their Interrelationships?, in Monograph of Genus Oryza, , Ed. Science Publishers, 2003.

Y.  R. Rozhevits, ?Crtical Botanical Review of Species of Rice?, in Monograph on Genus Oryza, , Ed. Enfield (NH), USA: Science Pubhers, Inc., 2003, pp. 1-60.

A.  Chevalier, ?New Contribution to Systematic Study of Genus Oryza?, in Monograph on Genus Oryza, , Ed. Enfield: Science Publishers, 2003, pp. 61-71.