- Authors: Santos, J., Araújo, H., Ferreira, M., Oliveira, I., Monteiro, S., Miodonski, J., Henriques, A., Lopez, A., Vingada, J.V.
- Title: Aerial survey of cetaceans along the Portuguese northern coast.
- Conference Title: 25th Annual Conference of the European Cetacean Society
- Conference Location: Cadiz, Spain
- Conference Date: March 21-23
- Year Published: 2011