(of)Wilckens, Otto. (1922). The Upper Cretaceous gastropods of New Zealand. <em>Paleontological Bulletin. New Zealand Geological Survey.</em> 9: viii + 1–42, pls. 1-5. page(s): 17 [details]
MolluscaBase eds. (2025). MolluscaBase. Pseudoperissolax similis (Wilckens, 1922) †. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1542141 on 2026-07-12
Marine Species Traits editorial board (2026). Marine Species Traits. Pseudoperissolax similis (Wilckens, 1922) †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1542141 on 2026-07-12
original description(of)Wilckens, Otto. (1922). The Upper Cretaceous gastropods of New Zealand. <em>Paleontological Bulletin. New Zealand Geological Survey.</em> 9: viii + 1–42, pls. 1-5. page(s): 17 [details]