1. Romanov V. G., “Structure of a fundamental solution to the Cauchy problem for Maxwell’s equations,” Differ. Uravn., vol. 22, no. 9, 1577–1587 (1986).
2. Romanov V. G., Inverse Problems of Mathematical Physics, VNU Science Press, Utrecht, The Netherlands (1987).
3. Romanov V. G., “The problem of recovering the permittivity coefficient from the modulus of the scattered electromagnetic field,” Sib. Math. J., vol. 58, no. 4, 711–717 (2017).
4. Romanov V. G., “Problem of determining the permittivity in the stationary system of Maxwell equations,” Dokl. Math., vol. 95, no. 3, 230–234 (2017).
5. Chadan K. and Sabatier P. C., Inverse Problems in Quantum Scattering Theory, Springer-Verlag, New York (1977).