Parascan, D., Danciu, M., & Ignea, G. (2006). New accomplishments in the taxonomy of Tracheophyta. In Lucrările sesiuni ştiinţifice Pădurea şi dezvoltarea durabilă, Braşov, Romania, 2005. (pp. 193-198). Transilvania University of Braşov (résumé).
Carmen Ulloa Ulloa et al., An integrated assessment of the vascular plant species of the Americas , Science, , vol. 358, no 6370, p. 1614-1617, DOI: 10.1126/science.aao0398, résumé.
springer.com
link.springer.com
Hegnauer, R. (1977). Cyanogenic compounds as systematic markers in Tracheophyta. In Flowering Plants (pp. 191-210). Springer Vienna (résumé).