1. L. Colin: Mathematics of Profile Inversion, Proc. of a Workshop, NASA Tech. Memo. X-62. 150, Ames Research Center, Moffet Field, CA (1972)
2. J.B. Keller: Am. Math. Mon. 83, 107–118 (1976)
3. R.L. Parker: Ann. Res. Earth Planet Sci. 5, 35–64 (1977)
4. K. Chadan, P.C. Sabatier: Inverse Problems in Quantum Scattering Theory, Texts and Monographs in Physics (Springer, Berlin, Heidelberg, New York 1977 )
5. W-M. Boerner: “State of the Art Review on Polarization Utilization in Electromagnetic Inverse Scattering”; Rpt. No. 78–3, Communications Laboratory, University of Illinois, Chicago (1978)