1. Cramp, S. &K. E. L. Simmons (1977): Handbook of the Birds of Europe, the Middle East and North Africa, Vol. I. Oxford.
2. Evans, P. G. H. (1986): Monitoring Seabirds in the Northeast Atlantic. In Mediterranean Marine Avifauna: 179–206. London, Paris, Tokyo.
3. Mainwood, A. R. (1976): The movements of Storm Petrels as shown by ringing. Ringing and Migration 1: 98–104.
4. Mayaud, N. (1932): Considerations sur la morphologie et la systematique de quelques puffins. Alauda 4: 41–78, errata 495.
5. Thomson, A. L. (1965): The transequatorial migration of the Manx Shearwater. L'oiseau et R.F.O. 35: 130–40.