Azzahra, Elmi Irmayanti, et al. “In Vitro Mutagenesis of Etlingera Elatior by Gamma Ray Intermittent Irradiation”. Journal of Tropical Crop Science, vol. 5, no. 3, Dec. 2018, pp. 111-8, doi:10.29244/jtcs.5.3.111-118.