Castro-Azofeifa, César. “Sightings of Orcinus Orca (Linnaeus, 1758) (Cetartiodactyla: Odontoceti: Delphinidae) in the Costa Rican Pacific (1990-2020)”. Revista Ciencias Marinas Y Costeras, July 2021, pp. 29-47, https://doi.org/10.15359/revmar.13-2.3.