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Perea-Atienza, E.; Gavilan, B.; Chiodin, M.; Abril, J. F.; Hoff, K. J.; Poustka, A. J.; Martinez, P. (2015). «The nervous system of Xenacoelomorpha: a genomic perspective». Journal of Experimental Biology. 218 (4): 618–628. ISSN0022-0949. PMID25696825. doi:10.1242/jeb.110379
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Perea-Atienza, E.; Gavilan, B.; Chiodin, M.; Abril, J. F.; Hoff, K. J.; Poustka, A. J.; Martinez, P. (2015). «The nervous system of Xenacoelomorpha: a genomic perspective». Journal of Experimental Biology. 218 (4): 618–628. ISSN0022-0949. PMID25696825. doi:10.1242/jeb.110379
Franzen, Ake; Afzelius, Bjorn A. (janeiro de 1987). «The ciliated epidermis of Xenoturbella bocki (Platyhelminthes, Xenoturbellida) with some phylogenetic considerations». Zoologica Scripta. 16 (1): 9–17. ISSN0300-3256. doi:10.1111/j.1463-6409.1987.tb00046.x