1. M. M. Lavrent'ev, V. G. Romanov, and S. P. Shishatskii, Ill-Posed Problems of Mathematical Physics and Analysis (Nauka, Moscow, 1980
2. Am. Math. Soc., Providence, R.I., 1986).
3. V. G. Romanov, Inverse Problems of Mathematical Physics (Moscow, Nauka, 1984) [in Russian].
4. S. I. Kabanikhin and A. Lorenzi, Identification Problems of Wave Phenomena (VSP, The Netherlands, 1999).
5. A. I. Prilepko, D. G. Orlovsky, and I. V. Vasin, Methods for Solving Inverse Problems in Mathematical Physics (Marcel Dekker, New York, 2000).