Hund, F. (1926). "Zur Deutung einiger Erscheinungen in den Molekelspektren" [On the interpretation of some phenomena in molecular spectra]. Zeitschrift für Physik (in German). 36 (9–10). Springer Science and Business Media LLC: 657–674. Bibcode:1926ZPhy...36..657H. doi:10.1007/bf01400155. ISSN1434-6001. S2CID123208730.
Mulliken, Robert S. (1 May 1927). "Electronic States and Band Spectrum Structure in Diatomic Molecules. IV. Hund's Theory; Second Positive Nitrogen and Swan Bands; Alternating Intensities". Physical Review. 29 (5). American Physical Society (APS): 637–649. Bibcode:1927PhRv...29..637M. doi:10.1103/physrev.29.637. ISSN0031-899X.
Mulliken, Robert S. (1928). "The assignment of quantum numbers for electrons in molecules. Extracts from Phys. Rev. 32, 186-222 (1928), plus currently written annotations". International Journal of Quantum Chemistry. 1 (1). Wiley: 103–117. doi:10.1002/qua.560010106. ISSN0020-7608.
Hund, F. (1926). "Zur Deutung einiger Erscheinungen in den Molekelspektren" [On the interpretation of some phenomena in molecular spectra]. Zeitschrift für Physik (in German). 36 (9–10). Springer Science and Business Media LLC: 657–674. Bibcode:1926ZPhy...36..657H. doi:10.1007/bf01400155. ISSN1434-6001. S2CID123208730.
Mulliken, Robert S. (1 May 1927). "Electronic States and Band Spectrum Structure in Diatomic Molecules. IV. Hund's Theory; Second Positive Nitrogen and Swan Bands; Alternating Intensities". Physical Review. 29 (5). American Physical Society (APS): 637–649. Bibcode:1927PhRv...29..637M. doi:10.1103/physrev.29.637. ISSN0031-899X.
Hund, F. (1926). "Zur Deutung einiger Erscheinungen in den Molekelspektren" [On the interpretation of some phenomena in molecular spectra]. Zeitschrift für Physik (in German). 36 (9–10). Springer Science and Business Media LLC: 657–674. Bibcode:1926ZPhy...36..657H. doi:10.1007/bf01400155. ISSN1434-6001. S2CID123208730.
Hund, F. (1926). "Zur Deutung einiger Erscheinungen in den Molekelspektren" [On the interpretation of some phenomena in molecular spectra]. Zeitschrift für Physik (in German). 36 (9–10). Springer Science and Business Media LLC: 657–674. Bibcode:1926ZPhy...36..657H. doi:10.1007/bf01400155. ISSN1434-6001. S2CID123208730.
Mulliken, Robert S. (1 May 1927). "Electronic States and Band Spectrum Structure in Diatomic Molecules. IV. Hund's Theory; Second Positive Nitrogen and Swan Bands; Alternating Intensities". Physical Review. 29 (5). American Physical Society (APS): 637–649. Bibcode:1927PhRv...29..637M. doi:10.1103/physrev.29.637. ISSN0031-899X.
Mulliken, Robert S. (1928). "The assignment of quantum numbers for electrons in molecules. Extracts from Phys. Rev. 32, 186-222 (1928), plus currently written annotations". International Journal of Quantum Chemistry. 1 (1). Wiley: 103–117. doi:10.1002/qua.560010106. ISSN0020-7608.