Halanych, K.M.; Bacheller, JD; Aguinaldo, AM; Liva, SM; Hillis, DM; Lake, JA «Evidence from 18S ribosomal DNA that the lophophorates are protostome animals». Science, 267, 5204, 1995, pàg. 1641–1643. DOI: 10.1126/science.7886451. PMID: 7886451.
Halanych, K.M.; Bacheller, JD; Aguinaldo, AM; Liva, SM; Hillis, DM; Lake, JA «Evidence from 18S ribosomal DNA that the lophophorates are protostome animals». Science, 267, 5204, 1995, pàg. 1641–1643. DOI: 10.1126/science.7886451. PMID: 7886451.