1. Arnaud, J. Beam and fiber optics. Academic Press, 1976.
2. Belishev, M.I. Wave bases in multidimensional inverse problems. Math. USSR Sb., 67 (1990), 23–42.
3. Belishev, M.I. The boundary control and the continuation of wave fields. Preprint P-I-90, Leningrad, 1990 (in Russian).
4. Belishev, M.I. Recent progress in the boundary control method. Inverse Problems, 23 (2007), R1-R67.
5. Belishev, M., Isakov, V., Pestov, L., Sharafutdinov, V. On the reconstruction of a metric from external electromagnetic measurements. Russ. Dokl. Akad. Nauk, 372 (2000), 298–300.