1. Identification of Scandinavian Bats by their Sounds;Ahlén,1981
2. The bat fauna of Sweden. Present knowledge on distribution and status;Ahlén;Fauna och flora,2011
3. Use of ultrasound detectors for bat studies in Europe: experiences from field identification, surveys, and monitoring;Ahlén;Acta Chiropterol.,1999
4. Skillnader mellan Skandinaviens tre Pipistrellus-arter;Ahlén;Fauna och Flora,2004
5. British Bats;Altringham,2003