1. V. G. Romanov, Inverse Problems of Mathematical Physics [in Russian], Nauka, Moscow (1984).
2. S. I. Kabanikhin, Projection-Difference Methods for the Determination of Coefficients of Hyperbolic Equations [in Russian], Nauka, Novosibirsk (1988).
3. M. I. Belishev and A. S. Blagoveshchenskii, Dynamic Inverse Problems in Wave Theory [in Russian], Izd. St. Peterburg University, St. Peterburg (1999).
4. S. I. Kabanikhin and M. A. Shishlenin, “Numerical algorithm for two-dimensional inverse acoustic problem based on Gel’fand-Levitan-Krein equation,” J. Inverse Ill-Posed Problems,
18, No. 9, 979–995 (2011).
5. S. I. Kabanikhin, Inverse and Ill-Posed Problems. Theory and Applications, De Gruyter (2011).