Talk:Hjorth parameters

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Interestingly, the exact same wording is also present in the paper "A novel EEG feature extraction method using Hjorth parameter" by Oh, Lee and Kim (2014). Should the paper be referenced for the description of the Hjorth parameters or should the authors of the article cite wikipedia? The section in the paper can be found at section II B.

(http://cspl.ee.pusan.ac.kr/sites/cspl/download/internation_j/IJEEE_2014_SHO.pdf)