Islam, M., M. Molla, T. Nasrin, A. M. Uddin, and K. Kobra. “Determination of Maturity Indices of BER (Zizyphus Mauritiana Lam.) Var. BARI Kul-2”. Bangladesh Journal of Agricultural Research, vol. 40, no. 1, June 2015, pp. 163-76, doi:10.3329/bjar.v40i1.23769.