Reference
Bartlomiej Popczyk, Grzegorz Lesinski, Anna Baumann, Blazej Wojtowicz (2008): Kuhl's pipistrelle, Pipistrellus kuhlii (Kuhl, 1817) or Pipistrellus lepidus Blyth, 1845, in Central Poland - accidental record or a result of expansion? – Nyctalus – Internationale Fledermaus-Fachzeitschrift – NF_13: 279 - 281.