F. - S.  Meng, ?Studies on Annalepis from Middle Triassic along the Yangtze river and its bearing on the origin of Isoëtes?, Acta Botanica Sinica, vol. 40, no. 8, pp. 768 - 774, 1998.

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.