Exploratory studies on neutron radiography with a small neutron source using a nuclear scintillation imaging technique : Sinha, A.; Bhawe, B.D.; Panchal, C.G.; Shyam, A.; Srinivasan, M.; Joshi, V.M. Nuclear Instruments and Methods in Physics Research, Section A, Vol. 377, No. 1, pp. 32–36. (Proceedings of the 2nd International Topical Meeting on Neutron Radiography System Design and Characterization, Rikkyo University (Japan), 12–18 Nov. 1995. Edited by Hisao Kobayashi and Kohichi Mochiki, North-Holland (1996))