Naher, M., S. Brahma, M. Islam, M. Sarkar, M. Hasan, and A. Fahim. “Productivity of Summer Onion to Different Sources and Levels of Potash”. Bangladesh Agronomy Journal, vol. 20, no. 1, Dec. 2017, pp. 37-43, doi:10.3329/baj.v20i1.34881.