Muhammad Hasnain, M. Hammad Nadeem Tahir, M. Ali Sher, and M. Asif Shehzad, “ESTIMATION OF GENETIC VARIABILITY AND CORRELATION AMONG DIFFERENT RYEGRASS GENOTYPES FOR FODDER YIELD AND QUALITY RELATED TRAITS”, Agric. Sci. J., vol. 3, no. 1, pp. 26–31, Jun. 2021.