Pettigrew, J.D., Little, L. & Steginga, T. 1986. Incubation period of the Australian Grass Owl Tyto capensis longimembris. The Emu 86: 117 [Mathews, G.M. 1925.
The Birds of Australia. Supplements 4 & 5. Bibliography of the Birds of Australia Pts 1 & 2. London : H.F. & G. Witherby viii 149 pp.]
