Нужны три статьи из J.Chem.Phys.:
1. K. Hansen, Comparison of algorithms for the calculation of molecular vibrational level densities, J. Chem. Phys. 128, 194103 (2008);
2. Xiao-Gang Wang and Tucker Carrington, Jr., Using a nondirect product discrete variable representation for angular coordinates to compute vibrational levels of polyatomic molecules, J. Chem. Phys. 128, 194109 (2008);
3. Cristina Puzzarini, Miriam Heckert, and Jürgen Gauss, The accuracy of rotational constants predicted by high-level quantum-chemical calculations. I. molecules containing first-row atoms, J. Chem. Phys. 128, 194108 (2008);
Спасибо!