Reference
Hans J. Baagooe (1986): Summer Occurrence of Vespertilio murinus Linné - 1758 and Eptesicus serotinus (Schreber - 1780) (Chiroptera, Mammalia) on Zealand, Denmaek, based on records of roosts and registrations with bat detectors. – Annalen des Naturhistorischen Museums in Wien – 88_89B: 281 - 291.