1. M. D. Petroff, M. G. Stapelbroek, ?Blocked Impurity Band Detectors?, U.S. Patent No. 4,568,960, February 4, 1986.
2. M. D. Petroff, M. G. Stapelbroek, W. A. Kleinhans, ?Solid State Photomultiplier?, U.S. Patent No. 4,586,068, April 29, 1986.
3. M. G. Stapelbroek, M. D. Petroff, R. Bharat, ?Intrinsic Impurity Band Conduction Detectors?, U.S. Patent No. 4,962,304, October 9, 1990.
4. D. M.Watson, M. T.Guptill, J. E.Huffman, T. N.Krabach, S. N.Raines, S.Satyapal, ?Germanium blocked-impurity-band detector arrays: Unpassivated devices with bulk substrates?, J. Appl. Phys. 74 (6), pp. 4199?4206, 15 September 1993.
5. R. A. Noel, ?Large Area Blocked Impurity Band Focal Plane Array Development?, Proc. International OE/Aerospace Sensing 1992 Symposium, April 1992.