• Cavalier-Smith, T. (2003) "Protist phylogeny and the high-level classification of Protozoa" (Filogeni protis dan pengelasan peringkat tinggi Protozoa". Jurnal Protistologi Eropah

39:338-348.

• Sina M. Adl, Alastair G. B. Simpson, Mark A. Farmer, Robert A. Andersen, O. Roger Anderson, John R. Barta, Samuel S. Bowser, Guy Brugerolle, Robert A. Fensome, Suzanne Fredericq, Timothy Y. James, Sergei Karpov, Paul Kugrens John Krug, Christopher E. Lane, Louise A. Lewis, Jean Lodge, Denis H. Lynn, David G. Mann, Richard M. Mccourt, Leonel Mendoza, Øjvind Moestrup, Sharon E. Mozley-Standridge, Thomas A. Nerad, Carol A. Shearer, Alexey V. Smirnov, Frederick W. Spiegel and Max F. J. R. Taylor. (2005) "The New Higher Level Classification of Eukaryotes with Emphasis on the Taxonomy of Protists" (Pengelasan Peringkat Tinggi Baru Eukariot dengan Penekanan terhadap Taksonomi Protis"). Jurnal Mikrobiologi Eukariot 52:(5) 399-451.