Wongpiyasatid, A. and Hormchan, P. (2000) “New Mutants of Perennial Portulaca grandiflora Through Gamma Radiation”, Agriculture and Natural Resources. Bangkok, Thailand, 34(3), pp. 408–416. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/240339 (accessed: 17 September 2026).