Lundberg, Arne (May 1986). "Adaptive advantages of reversed sexual size dimorphism in European owls". Ornis Scandinavica. 17 (2): 133–140. doi:10.2307/3676862. JSTOR3676862.
Lundberg, Arne (May 1986). "Adaptive advantages of reversed sexual size dimorphism in European owls". Ornis Scandinavica. 17 (2): 133–140. doi:10.2307/3676862. JSTOR3676862.