Rreferences

Books:

• K. Veera Reddy, "Symmetry and Spectroscopy of Molecules", New Age International (P) Limited, Publishers (1997).
• M.S.Gopinathan & V. Ramakrishnan, "Group Theory In Chemistry", Visal Publications (2000).
• F. A. Cotton, "Chemical Applications of Group Theory, Wiley-Interscience, New York (1963).