1. A.L. Ageev, T.V. Bolotova, and V.V. Vasin. Solution to the inverse gravity problem for two interfaces in a medium. Izvestiya, Physics of the Solid Earth. 34:225–227, 1998.
2. P. Anselone. Collectively Compact Operatar Approximation Theory. Prentice-Hall, Englewood Cliffs, New Jersey, 1971.
3. A.B. Bakushinskii. The problem of the convergence of the iteratively regularized Gauß-Newton method. Comput. Maths. Math. Phys., 32:1353–1359, 1992.
4. A.B. Bakushinskii. Universal linear approximations of solutions to nonlinear operator equations and their application. J. Inv. Ill-Posed Problems, 5:501–521, 1997.
5. A.B. Bakushinskii and A.V. Goncharskii. Iterative Methods far the Solution of Incorrect Problems. Nauka, Moscow, 1989. in Russian.