Lewis, S., Benvenuti, S., Daunt, F., Wanless, S., Dall'Antonia, L., Luschi, P., Elston, D. A., Hamer, K. C., & Sherratt, T. N. (2004). Partitioning of diving effort in foraging trips of northern gannets. Canadian Journal of Zoology, 82(12), 1910-1916. https://doi.org/10.1139/z05-005