Krois, Joachim, et al. “Temporal and Spatial Characteristics of Rainfall Patterns in the Northern Sierra of Peru – A Case Study for La Niña to El Niño Transitions from 2005 to 2010”. Espacio Y Desarrollo, no. 25, Oct. 2013, pp. 23-48, https://revistas.pucp.edu.pe/index.php/espacioydesarrollo/article/view/10621.