1. Babenko, L.M., Sheyko, O.A., Kosakivska, I.V., Vedenichova, N.P., Nehretsky, V.A., and Vasheka, V.O., Structural and functional characteristics of Pteridophytes (Polypodiophyta), Bull. Charkovsky Natl. Agr. Univ., Ser. Biol., 2015, vol. 1, no. 34, pp. 80–103.
2. Ross, M., Mapping the world’s pteridophyte diversity, systematics and floras, in Pteridology in Perspective, Camus, J.M. and Johns, R.J., Eds, Kew: Rojal Bot. Gardens, 1996, pp. 29–42.
3. Haufler, C.H., Pryer, K.M., Schuettpelz, E., Sessa, E.B., Farrar, D.R., Moran, R., Schneller, J.J., Watkins, J.E., Jr., and Windham, M.D., Sex and the single gametophyte: revising the homosporous vascular plant life cycle in light of contemporary research, BioScience, 2016, vol. 66, no. 11, pp. 928–937.
4. Atallah, N.M. and Banks, J.A., Reproduction and the pheromonal regulation of sex type in fern gametophytes, Front. Plant Sci., 2015, vol. 6, pp. 100–107.
5. Anterola, A., Shanle, E., Mansouri, K., Schuette, S., and Renzaglia, K., Gibberellin precursor is involved in spore germination in the moss Physcomitrella patens, Planta, 2009, vol. 229, no. 4, pp. 1003–1007.