S. Kolokytha, A. Flisch, T. Lüthi, M. Plamondon, A. Schwaninger, W. Vasser, D. Hardmeier, M. Costin, C. Vienne, F. Sukowski, U. Hassler, I. Dorion, N. Gadi, S. Maitrejean, A. Marciano, A. Canonica, E. Rochat, G. Koomen, and M. Slegt "Improving customs’ border control by creating a reference database of cargo inspection X-ray images", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 3, pp. 60–66, 2017, doi: 10.25046/aj020309.