Bateman RM, Dimichele WA (1994). "Heterospory - the most iterative key innovation in the evolutionary history of the plant kingdom". Biological Reviews of the Cambridge Philosophical Society. 69 (3): 345–417. doi:10.1111/j.1469-185x.1994.tb01276.x. S2CID29709953.
Bateman RM, Dimichele WA (1994). "Heterospory - the most iterative key innovation in the evolutionary history of the plant kingdom". Biological Reviews of the Cambridge Philosophical Society. 69 (3): 345–417. doi:10.1111/j.1469-185x.1994.tb01276.x. S2CID29709953.