von Proschwitz T. Three land-snail species new to the Norwegian fauna: Pupilla pratensis (Clessin, 1871), Vertigo ultimathule von Proschwitz, 2007 and Balea sarsii Philippi, 1847 [= B. heydeni von Maltzan, 1881]. Fauna Norv. [Internet]. 2010Nov.8 [cited 2024Apr.19];300:13-9. Available from: https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/628