A New Method of Matrix Spectral Factorization. - Gigla Janashia; Edem Lagvilava; Lasha Ephremidze (IEEE Trans. Inf. Theory, 2011)

An approximation of Daubechies wavelet matrices by perfect reconstruction filter banks with rational coefficients. - Lasha Ephremidze; Alexander Gamkrelidze; Edem Lagvilava (Adv. Comput. Math., 2013)

Rank-deficient spectral factorization and wavelets completion problem. - Lasha Ephremidze; Ilya M. Spitkovsky; Edem Lagvilava (Int. J. Wavelets Multiresolution Inf. Process., 2015)