Cavalier-Smith, Thomas (22 de junho de 2004). «Only six kingdoms of life». Proceedings. Biological sciences / The Royal Society. 271 (1545): 1251-1262. ISSN0962-8452. doi:10.1098/rspb.2004.2705
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Michal Levin, Leon Anavy, Alison G. Cole, Eitan Winter, Natalia Mostov, Sally Khair, Naftalie Senderovich, Ekaterina Kovalev, David H. Silver, Martin Feder, Selene L. Fernandez-Valverde, Nagayasu Nakanishi, David Simmons, Oleg Simakov, Tomas Larsson, Shang-Yun Liu, Ayelet Jerafi-Vider, Karina Yaniv, Joseph F. Ryan, Mark Q. Martindale, Jochen C. Rink, Detlev Arendt, Sandie M. Degnan, Bernard M. Degnan, Tamar Hashimshony, Itai Yanai. The mid-developmental transition and the evolution of animal body plans. Nature, 2016; DOI:10.1038/nature16994
Cavalier-Smith, Thomas (22 de junho de 2004). «Only six kingdoms of life». Proceedings. Biological sciences / The Royal Society. 271 (1545): 1251-1262. ISSN0962-8452. doi:10.1098/rspb.2004.2705