Porcupine river stingray (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Porcupine river stingray" in English language version.

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Soto, J.M.R.; Charvet-Almeida, P.; Pinto de Almeida, M. (2009). "Potamotrygon histrix". IUCN Red List of Threatened Species. 2009: e.T161657A5474126. doi:10.2305/IUCN.UK.2009-2.RLTS.T161657A5474126.en. Retrieved 19 November 2021.
Rosa, R.S.; Charvet-Almeida, P.; Quijada, C.C.D. (2010). "Biology of the South American Potamotrygonid Stingrays". In Carrier, J.C.; Musick, J.A.; Heithaus, M.R. (eds.). Sharks and Their Relatives II. Marine Biology. Vol. 20100521. CRC Press. pp. 241–285. doi:10.1201/9781420080483-c5. ISBN 978-1-4200-8047-6. {{cite book}}: |work= ignored (help)

Froese, Rainer; Pauly, Daniel (eds.) (2017). "Potamotrygon hystrix" in FishBase. 10 2017 version.

Soto, J.M.R.; Charvet-Almeida, P.; Pinto de Almeida, M. (2009). "Potamotrygon histrix". IUCN Red List of Threatened Species. 2009: e.T161657A5474126. doi:10.2305/IUCN.UK.2009-2.RLTS.T161657A5474126.en. Retrieved 19 November 2021.

"Des reproductions régulières en aquarium". Véronique Ivanov. 2009-01-05. Retrieved 31 August 2012.