(of)Ulrich, E. O.; Scofield, W. H. (1897). The Lower Silurian Gastropoda of Minnesota. <em>The Geology of Minnesota.</em> 3(2): 813-1081, pls. 61-82., available online athttps://www.biodiversitylibrary.org/page/14923788 page(s): 917, pl. 64, figs 19-21 [details]
MolluscaBase eds. (2025). MolluscaBase. Sphenosphaera bilineata (Ulrich & Scofield, 1897) †. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1767202 on 2025-05-19
Marine Species Traits editorial board (2025). Marine Species Traits. Sphenosphaera bilineata (Ulrich & Scofield, 1897) †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1767202 on 2025-05-19
original description(of)Ulrich, E. O.; Scofield, W. H. (1897). The Lower Silurian Gastropoda of Minnesota. <em>The Geology of Minnesota.</em> 3(2): 813-1081, pls. 61-82., available online athttps://www.biodiversitylibrary.org/page/14923788 page(s): 917, pl. 64, figs 19-21 [details]