Baumiller, Tomasz K.; Mooi, Rich; Messing, Charles G. (2008). “Urchins in the meadow: Paleobiological and evolutionary implications of cidaroid predation on crinoids”. Paleobiology. 34 (1): 22–34. doi:10.1666/07031.1. JSTOR20445573.
Gorzelak, Przemys Law; Rakowicz, Lukasz; Salamon, Mariusz A.; Szrek, Piotr (2011). “Inferred placoderm bite marks on Devonian crinoids from Poland”. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 259: 105–12. doi:10.1127/0077-7749/2010/0111.
Guensburg, Thomas E.; Mooi, Rich; Sprinkle, James; David, Bruno; Lefebvre, Bertrand (2010). “Pelmatozoan arms from the mid-Cambrian of Australia: Bridging the gap between brachioles and brachials? Comment: There is no bridge”. Lethaia. 43 (3): 432–40. doi:10.1111/j.1502-3931.2010.00220.x.
O'Malley, C. E.; Ausich, W. I.; Chin, Y.-P. (2013). “Isolation and characterization of the earliest taxon-specific organic molecules (Mississippian, Crinoidea)”. Geology. 41 (3): 347. Bibcode:2013Geo....41..347O. doi:10.1130/G33792.1. Tóm lược dễ hiểu – Phys.org (19 tháng 2 năm 2013). Note that the first sentence of the phys.org article contradicts the paper itself, which reviews several isolations of molecules from particular fossils over the past decade.
O'Malley, C. E.; Ausich, W. I.; Chin, Y.-P. (2013). “Isolation and characterization of the earliest taxon-specific organic molecules (Mississippian, Crinoidea)”. Geology. 41 (3): 347. Bibcode:2013Geo....41..347O. doi:10.1130/G33792.1. Tóm lược dễ hiểu – Phys.org (19 tháng 2 năm 2013). Note that the first sentence of the phys.org article contradicts the paper itself, which reviews several isolations of molecules from particular fossils over the past decade.
jstor.org
Baumiller, Tomasz K.; Mooi, Rich; Messing, Charles G. (2008). “Urchins in the meadow: Paleobiological and evolutionary implications of cidaroid predation on crinoids”. Paleobiology. 34 (1): 22–34. doi:10.1666/07031.1. JSTOR20445573.
O'Malley, C. E.; Ausich, W. I.; Chin, Y.-P. (2013). “Isolation and characterization of the earliest taxon-specific organic molecules (Mississippian, Crinoidea)”. Geology. 41 (3): 347. Bibcode:2013Geo....41..347O. doi:10.1130/G33792.1. Tóm lược dễ hiểu – Phys.org (19 tháng 2 năm 2013). Note that the first sentence of the phys.org article contradicts the paper itself, which reviews several isolations of molecules from particular fossils over the past decade.
tolweb.org
Ausich, William I.; Messing, Charles G. “Crinoidea”. Tree of Life. Truy cập ngày 14 tháng 3 năm 2011.