Feature representation: both components of the Fourier transform vs. Hartley transform. - Leonid Gelman (Pattern Recognit., 2002)

Signal recognition: Fourier transform vs. Hartley transform. - Leonid Gelman; Michael Sanderson; Christopher P. Thompson (Pattern Recognit., 2003)

Signal recognition: Fourier transform vs. Cosine transform. - Leonid Gelman; Michael Sanderson; Christopher P. Thompson (Pattern Recognit. Lett., 2003)