Tyto alba stertens Hartert, 1929
| On various forms of the genus Tyto. Tyto alba and T. longimembris and their subspecies E Hartert (1929) Novitates Zoologicae 35: 93-104 | |
| Distributional notes on Nepal birds R L Fleming and M A Traylor (1968) Fieldiana Zool. 53: 147-203 |