Testing for Quaternion Propriety. - Paul Ginzberg; Andrew T. Walden (IEEE Trans. Signal Process., 2011)

Quaternion VAR Modelling and Estimation. - Paul Ginzberg; Andrew T. Walden (IEEE Trans. Signal Process., 2013)

Matrix-Valued and Quaternion Wavelets. - Paul Ginzberg; Andrew T. Walden (IEEE Trans. Signal Process., 2013)