Nikolay G. Zverkov & Megan L. Jacobs (2021) [2020]. "Revision of Nannopterygius (Ichthyosauria: Ophthalmosauridae): reappraisal of the 'inaccessible' holotype resolves a taxonomic tangle and reveals an obscure ophthalmosaurid lineage with a wide distribution". Zoological Journal of the Linnean Society. 191 (1): 228–275. doi:10.1093/zoolinnean/zlaa028.
Patrick S. Druckenmiller; Jørn H. Hurum; Espen M. Knutsen; Hans Arne Nakrem (2012). "Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Upper Jurassic: Volgian/Tithonian), Svalbard, Norway". Norwegian Journal of Geology. 92 (2–3): 311–339. ISSN1502-5322. Low resolution pdfArchived 2015-09-24 at the Wayback MachineHigh resolution pdfArchived 2015-09-24 at the Wayback Machine
Patrick S. Druckenmiller; Jørn H. Hurum; Espen M. Knutsen; Hans Arne Nakrem (2012). "Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Upper Jurassic: Volgian/Tithonian), Svalbard, Norway". Norwegian Journal of Geology. 92 (2–3): 311–339. ISSN1502-5322. Low resolution pdfArchived 2015-09-24 at the Wayback MachineHigh resolution pdfArchived 2015-09-24 at the Wayback Machine
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Patrick S. Druckenmiller; Jørn H. Hurum; Espen M. Knutsen; Hans Arne Nakrem (2012). "Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Upper Jurassic: Volgian/Tithonian), Svalbard, Norway". Norwegian Journal of Geology. 92 (2–3): 311–339. ISSN1502-5322. Low resolution pdfArchived 2015-09-24 at the Wayback MachineHigh resolution pdfArchived 2015-09-24 at the Wayback Machine