1. Rebuffel, V., Dinten, M.: Dual-energy X-ray imaging: Benefits and limit. Insight-non-destructive testing and condition monitoring 49(10), 589–594 (2007)
2. Park, J.S., Kim, J.K.: Calculation of effective atomic number and normal density using a source weighting method in a dual energy X-ray inspection system. J. Korean Phys. Soc. 59(4), 2709–2713 (2011)
3. Duvillie, J., Dierick, M., Dhaene, J., Van, L.D., Masschaele, B., Geurts, R., Hoorebeke, L.V., Boone, M.N.: Inline multi-material identification via dual energy radiographic measurements. NDT and E Int. 94, 120–125 (2018)
4. Ogorodnikov, S.A.: Recognition of materials during radiation customs control based on a linear electron accelerator. (Dissertation of Candidate of Technical Sciences). St. Petersburg, Russia. D.V. Efremov Institute of Electrophysical Apparatus. (In Russian) (2002)
5. Gavrish, Yu.N., Berdnikov, Ya.A., Spirin, D.O., Perederiy, A.N., Safonov, M.V., I.V. Romanov, I.V.: Software package for restoration of introscopic images using the dual energy method. Problems of atomic science and technology. Series: Nuclear Physics Investigations 3(54), 123–125. (In Russian) (2010)