1. Table of Isotopes, Lederer, C.M. and Shirley, Eds., New York: Wiley, 1978, 7th Ed.
2. Alvarez Luis, W., US Patent 4 756 866, 1988.
3. Trower, W.P., Nucl. Instrum. Methods Phys. Res., Sect. B, 1993, vol. 79, p. 589.
4. Trower, W.P., Karev, A.I., et al., Nucl. Instrum. Methods Phys. Res., Sect. B, 1995, vol. 99, p. 736.
5. Trower, W.P., The Carbon and Nitrogen Cameras, Moscow: Izd-vo Lebedev Phys. Inst., 1992; Knapp, E.A., Saunders, A.W., and Trower, W.P., Direct Imaging of Explosives: Proc. Conf. MINE’99, Firenze, Italy, 1999; http://demining.jrc.it/aris/events/mine99/start.htm