Hartert, E. 1929. On various forms of the genus Tyto. Tyto longimembris and its subspecies. Novitates Zoologicae 35: 102-104 [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. Waterhouse, F.H. 1885.
The Dates of Publication of some of the Zoological Works of the late John Gould, F.R.S. London : R.H. Porter xi 59 pp. [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. Mathews, G.M. 1919.
The Birds of Australia. London : Witherby & Co. Vol. 7 pt 5 pp. 385–499 + xii pls 363–370 Appendixes A & B (Appendix B)]]
