Nonlinear Approach Of Construction of Fast Unitary Transforms. - Artyom M. Grigoryan; Merughan M. Grigoryan (CISS, 2006)

Discrete integer Fourier transform in real space: elliptic Fourier transform. - Artyom M. Grigoryan; Merughan M. Grigoryan (Image Processing: Algorithms and Systems, 2009)