R. Berger and M. Klessinger, “Algorithms for exact counting of energy levels of spectroscopic transitions at different temperatures,” J. Comp. Chem., 18 (1997) 1312-19. DOI: 3.0.CO;2-Q>10.1002/(SICI)1096-987X(19970730)18:103.0.CO;2-Q
R. Berger and M. Klessinger, “Algorithms for exact counting of energy levels of spectroscopic transitions at different temperatures,” J. Comp. Chem., 18 (1997) 1312-19. DOI: 3.0.CO;2-Q>10.1002/(SICI)1096-987X(19970730)18:103.0.CO;2-Q
