1. Karyotype analysis of eight species of Polygonatum Mill;Chen;Acta Phytotaxonomica Sinica,1989
2. Pollen morphology of 13 Chinese species of Polygonatum and its systematic significance;Deng;Journal of Wuhan Botanical Research,2007
3. A comparative study of mitosis in diploid and tetraploid species;Eigsti;American Journal of Botany,1942