1. Daniels, D. J., Ground Penetrating Radar, 2nd edition, IEE Radar, Sonar and Navigation Series 15, UK, 2004.

2. Marklein, R., K. J. Langenberg, K. Mayer, J. Miao, A. Shlivinski, A. Zimmer, W. Miller, V. Schmitz, C. Kohl, and U. Mletzko, "Recent applications and advances of numerical modeling and wavefield inversion in nondestructive testing," Adv. in Radio Sci., Vol. 3, 167-174, 2005.
doi:10.5194/ars-3-167-2005        Google Scholar

3. Yu, C., M. Yuan, J. Stang, E. Bresslour, R. T. George, A. Ybarra, W. T. Joines, and Q. H. Liu, "Active microwave imaging II: 3-D system prototype and image reconstruction from experimental data," IEEE Trans. Microw. Theor. Tech., Vol. 56, No. 4, 991-1000, 2008.
doi:10.1109/TMTT.2008.919661        Google Scholar

4. Chew, W. C., Waves and Fields in Inhomogeneous Media, IEEE Press, Piscataway, NJ, 1995.

5. Fhager, A. and M. Persson, "Using a priori data to improve the reconstruction of small objets in microwave tomography," IEEE Trans. Microw. Theor. Tech., Vol. 55, No. 11, 2454-2462, 2007.
doi:10.1109/TMTT.2007.908670        Google Scholar

6. Pastorino, M., "Stochastic optimization methods applied to microwave imaging: A review," IEEE Trans. Ant. Prop., Vol. 55, No. 3, 538-548, 2007.
doi:10.1109/TAP.2007.891568        Google Scholar

7. Slaney, M., A. C. Kak, and L. E. Larsen, "Limitation of imaging with firt-order diffraction tomography," IEEE Trans. Microw. Theor. Tech., Vol. 32, No. 8, 860-874, 1984.
doi:10.1109/TMTT.1984.1132783        Google Scholar

8. Pierri, R., A. Liseno, R. Solimene, and F. Soldovieri, "Beyond physical optics SVD shape reconstruction of metallic cylinders," IEEE Trans. Ant. Propag., Vol. 54, No. 2, 655-665, 2006.
doi:10.1109/TAP.2005.863121        Google Scholar

9. Bojarski, N. N., "A survey of the physical optics inverse scattering identity," IEEE Trans. Ant. Prop., Vol. 30, No. 5, 980-989, 1982.
doi:10.1109/TAP.1982.1142890        Google Scholar

10. Zhang, Z. Q. and Q. H. Liu, "Three-dimensional nonlinear image reconstruction for microwave biomedical imaging," IEEE Transactions on Biomedical Engineering, Vol. 51, 544-548, 2004.
doi:10.1109/TBME.2003.821052        Google Scholar

11. Semenov, S. Y., R. H. Svenson, A. E. Boulyshev, A. E. Souvorov, V. Y. Borisov, Y. Sizov, A. N. Starostin, K. R. Dezern, G. T. Tatsis, and V. Y. Baranov, "Microwave tomography: Two-dimensional system for biological imaging," IEEE Transactions on Biomedical Engineering, Vol. 43, 869-876, 1996.
doi:10.1109/10.532121        Google Scholar

12. Solimene, R., F. Soldovieri, G. Prisco, and R. Pierri, "Three-dimensional microwave tomography by a 2-D slice-based reconstruction algorithm ," IEEE Geosc. Rem. Sens. Lett., Vol. 4, No. 4, 556-560, 2007.
doi:10.1109/LGRS.2007.900741        Google Scholar

13. Soldovieri, F. and R. Solimene, "Through-wall imaging via a linear inverse scattering algorithm," IEEE Geosc. Rem. Sens. Lett., Vol. 4, No. 4, 513-517, 2007.
doi:10.1109/LGRS.2007.900735        Google Scholar

14. Solimene, R., A. Brancaccio, R. Pierri, and F. Soldovieri, "TWI experimental results by a linear inverse scattering approach," Progress In Electromagnetics Research, Vol. 91, 259-272, 2009.
doi:10.2528/PIER09021609        Google Scholar

15. Soldovieri, F., R. Solimene, and R. Pierri, "A simple strategy to detect changes in through the wall imaging," Progress In Electromagnetics Research M, Vol. 7, 1-13, 2009.
doi:10.2528/PIERM09030902        Google Scholar

16. Felsen, L. B. and N. Marcuwitz, Radiation and Scattering of Waves, Prentice-Hall, Englewood Cliffs, NJ, 1973.
doi:10.1109/9780470546307.ch1

17. Soldovieri, F., A. Brancaccio, G. Prisco, G. Leone, and R. Pierri, "A kirchhoff-based shape reconstruction algorithm for the multimonostatic configuration: The realistic case of buried pipes," IEEE Trans. Geosc. Rem. Sens., Vol. 47, No. 10, 3031-3038, 2008.
doi:10.1109/TGRS.2008.921959        Google Scholar

18. Bertero, M. and P. Boccacci, Introduction to Inverse Problems in Imaging, Institute of Physics, Bristol, UK, 1998.

19. Liseno, A., F. Soldovieri, and R. Pierri, "Improving a shape reconstruction algorithm with thresholds and multi-view data," AEU, Int. J. Electron. Commun., Vol. 58, 118-124, 2004.
doi:10.1078/1434-8411-54100216        Google Scholar

20. Solimene, R. and R. Pierri, "Number of degrees of freedom of the radiated field over multiple bounded domains," Opt. Lett., Vol. 32, No. 21, 3113-3115, 2007.
doi:10.1364/OL.32.003113        Google Scholar

21. Brancaccio, A., G. Leone, and R. Pierri, "Information content of Born scattered fields: Results in the circular cylindrical case," Journal of the Optical Society of America A, Vol. 15, 1909-1917, 1998.
doi:10.1364/JOSAA.15.001909        Google Scholar

22. Persico, R., F. Soldovieri, and G. Leone, "A microwave tomographic imaging approach for multibistatic configuration: The choice of the frequency step," IEEE Trans. Instrum. Meas., Vol. 55, 1926-1934, 2006.
doi:10.1109/TIM.2006.884346        Google Scholar

23. Dehmollaian, M., M. Thiel, and K. Sarabandi, "Through-the-wall imaging using differential SAR," IEEE Trans. Geosc. Rem. Sens., Vol. 47, No. 5, 1289-1296, 2006.
doi:10.1109/TGRS.2008.2010052        Google Scholar

24. Debes, C., M. G. Amin, and A. M. Zoubir, "Target detection in single- and multiple- view through-the-wall radar imaging," IEEE Trans. Geosci. Remote Sens., Vol. 47, No. 5, 1349-1361, 2009.
doi:10.1109/TGRS.2009.2013460        Google Scholar

25. Li, J. and E. G. Zelnio, "Target detection with synthetic aperture radar," IEEE Trans. Aerosp. Electr. Syst., Vol. 32, 613-627, 1996.        Google Scholar