A. Rajeswari, M. K. Murali, A. Ramu. 2021. “Vibrational Spectra(Theoretical, Experimental) and Optimized Structure, Frontire Molecular Orbital, Mulliken Atomic Charge Studies on Pentylenetetrazole (PTZ) Based on Density Functional Theory”. Design Engineering, September, 10815 -30. http://www.thedesignengineering.com/index.php/DE/article/view/3994.