Significant wave height (English Wikipedia)

Tayfun, Aziz (1980). "Narrow-band nonlinear sea waves". Journal of Geophysical Research. 85 (C3): 1543–1552. Bibcode:1980JGR....85.1548T. doi:10.1029/jc085ic03p01548.
Hanafin, Jennifer A.; Quilfen, Yves; Ardhuin, Fabrice; Sienkiewicz, Joseph; Queffeulou, Pierre; Obrebski, Mathias; Chapron, Bertrand; Reul, Nicolas; Collard, Fabrice; Corman, David; De Azevedo, Eduardo B.; Vandemark, Doug; Stutzmann, Eleonore (2012). "Phenomenal Sea States and Swell from a North Atlantic Storm in February 2011: A Comprehensive Analysis". Bulletin of the American Meteorological Society. 93 (12): 1825–1832. Bibcode:2012BAMS...93.1825H. doi:10.1175/BAMS-D-11-00128.1.

harvard.edu

Tayfun, Aziz (1980). "Narrow-band nonlinear sea waves". Journal of Geophysical Research. 85 (C3): 1543–1552. Bibcode:1980JGR....85.1548T. doi:10.1029/jc085ic03p01548.
Hanafin, Jennifer A.; Quilfen, Yves; Ardhuin, Fabrice; Sienkiewicz, Joseph; Queffeulou, Pierre; Obrebski, Mathias; Chapron, Bertrand; Reul, Nicolas; Collard, Fabrice; Corman, David; De Azevedo, Eduardo B.; Vandemark, Doug; Stutzmann, Eleonore (2012). "Phenomenal Sea States and Swell from a North Atlantic Storm in February 2011: A Comprehensive Analysis". Bulletin of the American Meteorological Society. 93 (12): 1825–1832. Bibcode:2012BAMS...93.1825H. doi:10.1175/BAMS-D-11-00128.1.

Hanafin, Jennifer A.; Quilfen, Yves; Ardhuin, Fabrice; Sienkiewicz, Joseph; Queffeulou, Pierre; Obrebski, Mathias; Chapron, Bertrand; Reul, Nicolas; Collard, Fabrice; Corman, David; De Azevedo, Eduardo B.; Vandemark, Doug; Stutzmann, Eleonore (2012). "Phenomenal Sea States and Swell from a North Atlantic Storm in February 2011: A Comprehensive Analysis". Bulletin of the American Meteorological Society. 93 (12): 1825–1832. Bibcode:2012BAMS...93.1825H. doi:10.1175/BAMS-D-11-00128.1.