Systematic range Ciliate, dasycladacean and hexamita nuclear code

^ hoffman dc, anderson rc, dubois ml, prescott dm (1995). macronuclear gene-sized molecules of hypotrichs . nucleic acids research. 23 (8): 1279–83. doi:10.1093/nar/23.8.1279. pmc 306850 . pmid 7753617. 
^ schneider su, leible mb, yang xp (1989). strong homology between small subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase of 2 species of acetabularia , occurrence of unusual codon usage . molecular & general genetics. 218 (3): 445–52. doi:10.1007/bf00332408. pmid 2573818. 
^ schneider su, de groot ej (1991). sequences of 2 rbcs cdna clones of batophora oerstedii: structural , evolutionary considerations . current genetics. 20 (1-2): 173–5. doi:10.1007/bf00312782. pmid 1934113.