Pandey, R., A. K. Singh, and S. S. Kashyap. “Yield Gap Analysis of Mustard in District Sonbhadra”. Central Asian Journal of Medical and Natural Science, Vol. 3, no. 3, June 2022, pp. 848-54, https://cajmns.centralasianstudies.org/index.php/CAJMNS/article/view/860.