Analysis of information sources in references of the Wikipedia article "Enhanced Fujita scale" in English language version.
Next, four damage-based wind speed rating methods for tornados are introduced: the Fujita-Scale (F-Scale); the Enhanced Fujita-Scale (EF-Scale); the Canadian Enhanced Fujita-Scale (CEF-Scale); and the Japanese Enhanced Fujita-Scale (JEF-Scale)...The CEF-Scale was proposed in 2013 by Environment Canada, closely following the EF-Scale, while the CEF-Scale uses 31 DIs.