K.V. RAMANA MURTHY, D.S. REDDY, and G. PRABHAKARA REDDY, “Response of rice (Oryza sativa) varieties to graded levels of nitrogen under aerobic culture”, IJA, vol. 57, no. 4, pp. 367–372, Oct. 2001, doi: 10.59797/ija.v57i4.4648.