Poudel, M., H. Paudel, and B. Yadav. “Correlation of Traits Afffecting Grain Yield in Winter Maize (Zea Mays L.) Genotypes”. International Journal of Applied Sciences and Biotechnology, vol. 3, no. 3, Sept. 2015, pp. 443-5, doi:10.3126/ijasbt.v3i3.13137.