SINGH VIRDI, Jasvinderpal. Lie Algebraic Approach and Complex Invariant Coupled Oscillator Systems. Global Journal of Science Frontier Research, [S.l.], aug. 2013. ISSN 2249-4626. Available at: <https://journalofscience.org/index.php/GJSFR/article/view/931>. Date accessed: 18 may 2022.