Haplophrentis (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Haplophrentis" in Portuguese language version.

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dur.ac.uk

Moysiuk, Joseph; Smith, Martin R.; Caron, Jean-Bernard (2017). "Hyoliths are Palaeozoic lophophorates" (PDF). (em inglês). Nature.

Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale" (em inglês). PALAIOS.

Babcock, L. E.; Robison, R. A. (1988). "Taxonomy and paleobiology of some Middle Cambrian Scenella (Cnidaria) and Hyolithids (Mollusca) from western North America" (PDF). (em inglês). University of Kansas Paleontological Contributions. 121: 1–22. ASIN B00071LPJW. hdl:1808/3638. OCLC 19610612.