Rowlands, B. W., Trueman, T., Olson, Storrs L., McCulloch, M. N., and Brooke, R. K. 1998. The Birds of St. Helena, An Annotated Checklist. British Ornithologists' Union. In BOU Checklist No. 16.
Ascension Island. Centenary Expedition, British Ornithologists' Union. Dampiem Spring. Rocky-slope of ravine in sheltered crevice., St. Helena Islands, Africa
Ascension Island. Centenary Expedition, British Ornithologists' Union. Ascension. ½ way up S.E. slope of Green Mountain. Steep rock slope facing S.E., St. Helena Islands, Africa
Mathews, Gregory M. 1927. Systema avium Australasianarum. A systematic list of the birds of the Australasian region. : London] British Ornithologists' Union
Rowlands, B. W., Trueman, T., Olson, Storrs L., McCulloch, M. N. and Brooke, R. K. 1998. The Birds of St. Helena, An Annotated Checklist. British Ornithologists' Union, pp., pp.
Smith, Neal Griffith. 1985. Sharpbill. In: Campbell, Bruce A. and Lack, Elizabeth, A dictionary of birds. : The British Ornithologists' Union,() pp.533
Smith, Neal Griffith. 1985. Nesting associations. In: Campbell, Bruce A. and Lack, Elizabeth, A dictionary of birds. : The British Ornithologists' Union,() pp.389-391.
Mathews, Gregory Macaliste. 1927. Systema avium Australasianarum. A systematic list of the birds of the Australasian region. London] British Ornithologists' Union.
Smith, Neal Griffith. 1985. "Sharpbill." In A dictionary of birds. Campbell, Bruce A. and Lack, Elizabeth, editors. 533. The British Ornithologists' Union.
Smith, Neal Griffith. 1985. "Nesting associations." In A dictionary of birds. Campbell, Bruce A. and Lack, Elizabeth, editors. 389–391. The British Ornithologists' Union.
