Iqbal, M. S., A. Ghafoor, M. Akbar, S. Akhtar, S. Fatima, and E. H. Siddqui. “Genetic Variation and Path Analysis for Yield and Other Agronomic Traits in Nigella Sativa L. Germplasm”. Bangladesh Journal of Botany, vol. 48, no. 3, Sept. 2019, pp. 521-7, doi:10.3329/bjb.v48i3.47913.