Alastair G. Simpson (2003). "Cytoskeletal organization, phylogenetic affinities and systematics in the contentious taxon Excavata (Eukaryota)". International Journal of Systematic and Evolutionary Microbiology53: 1759–1777. PMID14657103. doi:10.1099/ijs.0.02578-0.
T. Cavalier-Smith (1981). "Eukaryote Kingdoms: Seven or Nine?". BioSystems 14 (3–4): 461–481. DOI:10.1016/0303-2647(81)90050-2. PMID 7337818.
David J. Patterson (1999). "The Diversity of Eukaryotes". American Naturalist 154 (S4): S96–S124. DOI:10.1086/303287. PMID 10527921.
Baldauf et al.; Roger, AJ; Wenk-Siefert, I; Doolittle, WF (2000). "A Kingdom-Level Phylogeny of Eukaryotes Based On Combined Protein Data". Science 290 (5493): 972–977. DOI:10.1126/science.290.5493.972. PMID 11062127.
Alastair G. Simpson (2003). "Cytoskeletal organization, phylogenetic affinities and systematics in the contentious taxon Excavata (Eukaryota)". International Journal of Systematic and Evolutionary Microbiology53: 1759–1777. PMID14657103. doi:10.1099/ijs.0.02578-0.