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Simon, J., Danet, B., Ameye-Maury, M., Roux, G., Morucci, J. P., & Guiraud, R. (1981). A performance study of a new image intensifier γ-camera. International Journal of Nuclear Medicine and Biology, 8(2-3), 199–203. doi:10.1016/0047-0740(81)90076-0 
10.1016/0047-0740(81)90076-0