"Agonistic behavior in harbor seals (Phoca vitulina) : a comparative study on the influence of haul-out site availability on aggressive behavior" in Theses and Dissertations

"Red-pelaged harbour seals, in Humboldt County, California: why some seals rust" in Marine Pollution Bulletin

"Agonistic behavior in harbor seals (Phoca Vitulina) in relation to the availability of haul-out space" in Marine Mammal Science

"Seasonal movements of short-beaked common dolphins (Delphinus delphis) in the north-western Bay of Plenty, New Zealand: Influence of sea surface temperature and El Niño/La Niña" in New Zealand Journal of Marine and Freshwater Research

"Photo-identification of short-beaked common dolphins (Delphinus delphis) in north-east New Zealand: A photo-catalogue of recognisable individuals" in New Zealand Journal of Marine and Freshwater Research

"Behaviour and ecology of common dolphins (Delphinus delphis) and the impact of tourism in Mercury Bay, North Island, New Zealand" in Science for Conservation