Srinivasan, R. ., Kuchibhotla, A. ., Srinivasu, G. . and Matad, B. . (2010) “HP Labs India’s Technology to Make Printed Paper Documents Tamper-Proof”, Journal of Technology Management for Growing Economies, 1(1), pp. 9–22. doi: 10.15415/jtmge.2010.11001.