Cherns, Lesley; Wheeley, James R.; Wright, V. Paul (2010). "Taphonomic Bias in Shelly Faunas Through Time: Early Aragonitic Dissolution and Its Implications for the Fossil Record". Taphonomy. Topics in Geobiology. 32: 79–105. doi:10.1007/978-90-481-8643-3_3. ISBN978-90-481-8642-6.
Morris, Simon Conway (March 2008). "A redescription of a rare chordate, Metaspriggina Walcotti Simonetta and Insom, from the Burgess Shale (Middle Cambrian), British Columbia, Canada". Journal of Paleontology. 82 (2): 424–430. Bibcode:2008JPal...82..424M. doi:10.1666/06-130.1. S2CID85619898.
Morris, Simon Conway (March 2008). "A redescription of a rare chordate, Metaspriggina Walcotti Simonetta and Insom, from the Burgess Shale (Middle Cambrian), British Columbia, Canada". Journal of Paleontology. 82 (2): 424–430. Bibcode:2008JPal...82..424M. doi:10.1666/06-130.1. S2CID85619898.
Morris, Simon Conway (March 2008). "A redescription of a rare chordate, Metaspriggina Walcotti Simonetta and Insom, from the Burgess Shale (Middle Cambrian), British Columbia, Canada". Journal of Paleontology. 82 (2): 424–430. Bibcode:2008JPal...82..424M. doi:10.1666/06-130.1. S2CID85619898.