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Nomakstainsky, M (2009. augusztus 11.). „Centralization of the deuterostome nervous system predates chordates”. Current Biology19 (15), 1264–9. o. DOI:10.1016/j.cub.2009.05.063. PMID19559615.
(2012) „Biomineral ultrastructure, elemental constitution and genomic analysis of biomineralization-related proteins in hemichordates”. Proceedings of the Royal Society B: Biological Sciences279 (1740), 3041–3048. o. DOI:10.1098/rspb.2012.0335. PMID22496191. PMC3385480.
(1998. január 1.) „The Spawning and Early Development of the Hawaiian Acorn worm (Hemichordate), Ptycodhera flava”. Zoological Science15 (1), 85–91. o. DOI:10.2108/zsj.15.85. PMID18429670.
(November–December 2001) „Deuterostome evolution: early development in the enteropneust hemichordate, Ptychodera flava”. Evolution & Development3 (6), 375–90. o. DOI:10.1046/j.1525-142x.2001.01051.x. PMID11806633.
(2019. január 1.) „Mitogenomics Reveals a Novel Genetic Code in Hemichordata” (angol nyelven). Genome Biology and Evolution11 (1), 29–40. o. DOI:10.1093/gbe/evy254. PMID30476024. PMC6319601.
(2012) „Biomineral ultrastructure, elemental constitution and genomic analysis of biomineralization-related proteins in hemichordates”. Proceedings of the Royal Society B: Biological Sciences279 (1740), 3041–3048. o. DOI:10.1098/rspb.2012.0335. PMID22496191. PMC3385480.
(2019. január 1.) „Mitogenomics Reveals a Novel Genetic Code in Hemichordata” (angol nyelven). Genome Biology and Evolution11 (1), 29–40. o. DOI:10.1093/gbe/evy254. PMID30476024. PMC6319601.
worldcat.org
Maletz, Jörg (2014). „The classification of the Pterobranchia (Cephalodiscida and Graptolithina)”. Bulletin of Geosciences89 (3), 477–540. o. DOI:10.3140/bull.geosci.1465. ISSN1214-1119.