1. Checked Baggage Screening, TSA website, https://www.tsa.gov/travel/security-screening (18 March 2016)
2. Airport Consultants Council website, https://www.acconline.org/Documents/Events/SCD/Presentations/2014/2014%20ACC-TSA%20Presentation%20FINAL.pdf (24 June 2014)
3. A Different Energy — CT Manufacturers Develop Different Approaches to Spectral Scanning;Lentz,2014
4. Lawrence Livermore National Laboratory Paper, “Preventing Terror in the Skies” https://str.llnl.gov/June 11/pdfs/6.11.4.pdf (June 2011)
5. Z. Ying, R. Naidu, K. Guilbert, D. Schafer and C. R. Crawford, "Dual Energy Volumetric X-ray Tomographic Sensor for Luggage Screening," Sensors Applications Symposium, 2007. SAS ‘07. IEEE, San Diego, CA, 2007, pp. 1-6. doi: 10.1109/SAS.2007.374371