Trenberth, Kevin E.; Hoar, Timothy J. The 1990–1995 El Niño–Southern Oscillation event: Longest on record. Geophysical Research Letters. January 1996, 23 (1): 57&–;60. Bibcode:1996GeoRL..23...57T. doi:10.1029/95GL03602.
Collins, M., et al.,(2010): The impact of global warming on the tropical Pacific Ocean and El Niño. Nature Geosci., 3 (6), 391–397, URL http://dx.doi.org/10.1038/ngeo868
Trenberth, Kevin E.; Hoar, Timothy J. The 1990–1995 El Niño–Southern Oscillation event: Longest on record. Geophysical Research Letters. January 1996, 23 (1): 57&–;60. Bibcode:1996GeoRL..23...57T. doi:10.1029/95GL03602.