A. Tikhonov, and V. Arsenin. V. H. Winston & Sons, Washington, D.C.: John Wiley & Sons, New York, (1977)Translated from the Russian, Preface by translation editor Fritz John, Scripta Series in Mathematics.
M. Bertero, F. Grünbaum, and L. Rebolia. Inverse Problems. An International Journal on the Theory and Practice of Inverse Problems, Inverse Methods and Computerized Inversion of Data2 (2):