Gajardo, N., González, H. E. and Marchant, M. (2013) “Characterization of El Niño, La Niña, and normal conditions through planktonic foraminifera (2006–2007) in the southeastern Pacific”, Ciencias Marinas, 39(3), pp. 253–264. doi: 10.7773/cm.v39i3.2177.