Sagástegui, Abundio. “The Biodiversity and ‘El Niño 1997-98’ in Northern Peru”. Revista Peruana de Biología 6, no. 3 (December 31, 1999): 183–186. Accessed June 7, 2025. https://revistasinvestigacion.unmsm.edu.pe/index.php/rpb/article/view/8450.