Sangeeta Prasher, Priya Sangar, and Mukesh Kumar. “Normal Coordinate Analysis and Vibrational Modes of Nitrosylchloride”. Journal of International Academy of Physical Sciences, vol. 16, no. 2, June 2012, pp. 205-9, https://www.iaps.org.in/journal/index.php/journaliaps/article/view/408.