B. T. Arain, M. J. Baloch, Q.-U.-A. Bughio, P. Sial, M. A. Arain, and A. Baloch, “Estimation of Heterosis and Combining Ability in F1 Hybrids of Upland Cotton for Yield and Fibre Traits: Upland Cotton Yield and Fibre Traits”, Pakistan Journal of Scientific & Industrial Research, vol. 58, no. 3, pp. 132–139, Dec. 2015.