Kumar, R. ., A. K. . Singh, K. Tomar, and A. K. . Gupta. “Effects of Different Media on Growth and Flowering Traits of Calendula Officinalis L”. Bangladesh Journal of Botany, vol. 51, no. 3, Oct. 2022, pp. 417-24, doi:10.3329/bjb.v51i3.61986.