Pennycuick, C.J. (1987). Flight of seabirds, in: Croxall, J.P. (Ed.) Seabirds: feeding ecology and role in marine ecosystems. pp. 43-62
In: Croxall, J.P. (Ed.) (1987). Seabirds: Feeding ecology and role in marine ecosystems. Cambridge University Press: Cambridge. ISBN 0-521-30178-5. 408 pp., meer
