An efficient regeneration system via direct and indirect organogenesis for the medicinal plant Dysosma versipellis (Hance) M. Cheng and its potential as a podophyllotoxin source - Weimei Jiang; Luxi Chen; Qi Pan; Yingxiong Qiu; Yingying Shen; Chengxin Fu (Acta Physiologiae Plantarum, 2012)