1. The Effect of Colchicine on Spermatogenesis in a Fern, Pteridium aquilinum (L.) Kuhn
2. Carothers, Z. B., and J. G. Duckett. 1979.Spermatogenesis in the systematics andphylogeny of the Hepaticae and Anthocer-otae. Pages 425-445 in G. C. S. Clarke andJ. G. Duckett, eds. Bryophyte Systematics.Systematics Association Special Vol. No.14. Academic Press, New York.CarothersSpermatogenesis in the systematics and phylogeny of the Hepaticae and Anthocerotae425Bryophyte Systematics1979
3. Der Feinbau des Spermatozoids von Sphaeroc arpos donnellii Aust. (Hepaticae)