Alam, M., S. Haider, and N. Paul. “Study of Diversity Estimates of Yield and Yield Related Characters in Response to Nitrogen Fertilizers of Barley Genotypes”. Bangladesh Journal of Genetics and Biotechnology, vol. 5, no. 1, Oct. 2007, pp. 19-21, https://banglajol.info/index.php/BJGB/article/view/420.