Kroh, A.; Mooi, R. (2021). World Echinoidea Database.
Plexechinus nordenskjoldi Mortensen, 1905. Accessed through: RAS (Eds.) (2021) Register of Antarctic Species at: http://ras.biodiversity.aq/aphia.php?p=taxdetails&id=174989 on 2025-04-04
RAS (Eds.) (2025). Register of Antarctic Species.
Plexechinus nordenskjoldi Mortensen, 1905. Accessed at: https://ras.biodiversity.aq/aphia.php/aphia.php?p=taxdetails&id=174989 on 2025-04-04