Merritt & Matinko (1987). ”Eptesicus fuscus”. Guide to the Mammals of Pennsylvania. University of Pittsburgh Press. sid. 103
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B. J. Verts,Leslie N. Carraway, red (1998). ”Eptesicus fuscus”. Land Mammals of Oregon. University of California Press. sid. 107-110. ISBN 0-520-21199-5