Barash, M. (November 2014). “Mass Extinction of the Marine Biota at the Ordovician–Silurian Transition Due to Environmental Changes”. 《Oceanology》 54 (6): 780–787. Bibcode:2014Ocgy...54..780B. doi:10.1134/S0001437014050014.
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Barash, M. (November 2014). “Mass Extinction of the Marine Biota at the Ordovician–Silurian Transition Due to Environmental Changes”. 《Oceanology》 54 (6): 780–787. Bibcode:2014Ocgy...54..780B. doi:10.1134/S0001437014050014.
Harper, D. A. T., Hammarlund, E. U., & Rasmussen, C. M. Ø. (May 2014). “End Ordovician extinctions: A coincidence of causes”. 《Gondwana Research》 25 (4): 1294–1307. Bibcode:2014GondR..25.1294H. doi:10.1016/j.gr.2012.12.021. CS1 관리 - 여러 이름 (링크)