References
- BurrowsG. E. (2010a) A guide to the gynoecium. Journal of Biological Education, 44 (2), 93-95
- BurrowsG. E. (2010b) Teaching flower structure and floral formulae — a mix of the real and virtual worlds. American Biology Teacher, 72 (5), 276-280
- GovaertsR. (2003) How many species of seed plants are there? — a response. Taxon, 52 (3), 583-584
- JuddW. S., CampbellC. S., KelloggE. A., StevensP. F. and DonoghueM. J. (2008) Plant systematics: a phylogenetic approach. Sunderland, Massachusetts, USA : Sinauer Associates