1. L. D. Faddeev, in Contemporary Problems of Mathematics (VINITI, Moscow, 1974), Vol. 3, pp. 93–180 [in Russian].
2. K. Shadan and P. C. Sabatier, Inverse Problems in Quantum Scattering Theory (Springer-Verlag, New York, 1977; Mir, Moscow, 1980).
3. R. G. Novikov and G. M. Khenkin, Russ. Math. Surveys, 42, 109 (1987).
4. R. Stotzka, H. Widmann, T. Müller, K. Schlote-Holubek, H. Gemmeke, N. Ruiter, and G. Göbel, Proc. SPIE. Medical Imaging 2004: Ultrasonic Imaging and Signal Processing, Ed. by W.F. Walker and S.Y. Emelianov, vol. 5373, p. 70.
5. T. Hopp, G. F. Schwarzenberg, M. Zapf, and N. V. Ruiter, Int. J. Adv. Software 2, 11 (2009).