1. Pure and Appl Physics Japan Quantum Chern Suppl in Quantum Dynamics of Molecules ; The New Experimental Challenge of Theorists Plenum Press New York ibid;Kato;Trans Amer Math SOC Math Suppl Int J,1951
2. London Altmann;Longuet;Mol Phys Proc Roy SOC Mol Phys Mol Phys Theor Chim Acta Rev Mod Phys,1963
3. Quantum Chern Spectral Theory and Differential Problems Oklahoma See also and;Mwdin;Int J Proc Syrnp Phys Reu Chem Phys Int J Quantum Chem,1982
4. Quantum Dynamics of Molecules ; The New Experimental Challenge of Theorists Plenum Press New York;Eckkart;Phys Rev,1934
5. Palermo;Weyl;Rend Circ,1909