Verma, Arvind K., et al. “In Vitro Isolation of Red Coloured Mutant from Chimeric Ray Florets of Chrysanthemum Induced by Gamma-Ray”. Indian Journal of Horticulture, vol. 69, no. 04, Dec. 2012, pp. 562-7, https://journal.iahs.org.in/index.php/ijh/article/view/2043.