1. Circulant Matrices;Davis,1979
2. Properties of multilevel block α-circulants;Trench;Linear Algebra Appl.,2009
3. Multi-Grid Methods and Applications;Hackbush,1979
4. Multigrid methods for Toeplitz linear systems with different size reduction;Donatelli;BIT,2011
5. Ten Lectures on Wavelets;Daubechies,1992