H.  Liu, Wang, Q. F., and Taylor, W. C., ?Morphological and anatomical variation in sporophylls of Isoetes sinensis palmer (Isoetaceae), an endangered quillwort in China?, American Fern Journal, vol. 96, no. 3, pp. 67 - 74, 2006.

X.  Liu, Liu, H., and Wang, Q. - F., ?Spore morphology of Isoëtes (isoëtaceae) from China?, Journal of Systematics and Evolution, vol. 46, no. 4, pp. 479 - 489, 2008.