A comparative study of the vibrational spectra of OCS and HCP using the Lie algebraic method N. K. Sarkar, J. Choudhury, S. R. Karumuri and R. Bhattacharjee Eur. Phys. J. D, 53 2 (2009) 163-171 Published online: 19 March 2009 DOI: 10.1140/epjd/e2009-00094-8