Usman, M., M. J. Hyder, S. A. Janjua, and M. A. Aleem. “STUDY OF NEAR INFRARED ABSORPTION SPECTROSCOPY OF SELECTED PAIRS OF ORGANIC SOLVENTS FOR QUALITY CONTROL APPLICATIONS”. The Nucleus, vol. 47, no. 4, Dec. 2010, pp. 273-7, http://thenucleuspak.org.pk/index.php/Nucleus/article/view/872.