- Dewey, D.R. and Lu, K.H. (1959). Agron. J., 51: 515-518.
- Johnson, H.W. et al. (1955). Agron. J., 47: 314-318.
- Ram Bakshi and Hemaprabha, G. (1997). Indian J. Agric. Res., 31(1): 23-27.
- Ram Bakshi et al. (1995). Indian J. Sug. Technol., 10: 10-14.
- Ram Bakshi and Shanker Kripa (1996). Indian J. Sug. Technol., 11: 162-165.