1. "Theoretical Numerical Analysis. A Functional Analysis Framework,";K. Atkinson;3rd edition,2009
2. "Iterative Methods for Approximate Solution of Inverse Problems,";A. B. Bakushinsky;Mathematics and its Applications (New York),2004
3. "Stable Solution of Inverse Problems,";J. Baumeister;Friedr. Vieweg & Sohn,1987
4. "Introduction to Inverse Problems in Imaging,";M. Bertero;Institute of Physics Publishing,1998
5. "Matrix Analysis,";R. Bhatia;Graduate Texts in Mathematics,1997