Gorjanović-Kramberger, C. (1890). Die praepontischen Bildungen des Agramer Gebirges. Glasnik hrvatskoga naravoslovnoga društva. 5, 151-163., available online athttps://www.biodiversitylibrary.org/page/11105025 page(s): 155, pl. 6, fig. 4 [details]
MolluscaBase eds. (2021). MolluscaBase. Limnaea extensa Gorjanovic-Kramberger, 1890 †. Accessed through: Neubauer, T.A.; Harzhauser, M.; Kroh, A.; Georgopoulou, E.; Mandic, O. (2014) Freshwater Gastropods of the European Neogene database (FreshGEN) at: http://www.marinespecies.org/freshgen/aphia.php?p=taxdetails&id=1050754 on 2025-05-21
Neubauer, T.A.; Harzhauser, M.; Kroh, A.; Georgopoulou, E.; Mandic, O. (2014). Freshwater Gastropods of the European Neogene database (FreshGEN). Limnaea extensa Gorjanović-Kramberger, 1890 †. Accessed at: https://marinespecies.org/freshgen/aphia.php?p=taxdetails&id=1050754 on 2025-05-21
original descriptionGorjanović-Kramberger, C. (1890). Die praepontischen Bildungen des Agramer Gebirges. Glasnik hrvatskoga naravoslovnoga društva. 5, 151-163., available online athttps://www.biodiversitylibrary.org/page/11105025 page(s): 155, pl. 6, fig. 4 [details]