Bravo Cabrera, José Luis, Enrique Azpra Romero, Victor Carlos Zarraluqui Such, Carlos Gay García, and Francisco Estrada Porrúa. 2010. “Significance Tests for the Relationship Between ‘El Niño’ Phenomenon and Precipitation in Mexico”. Geofisica Internacional 49 (4):245-61. https://doi.org/10.22201/igeof.00167169p.2010.49.4.132.