Hartmann, H.; Longuet-Higgins, H. C «Erich Hückel. 9 August 1896-16 February 1980». Biographical Memoirs of Fellows of the Royal Society, 28, 1982, pàg. 152. DOI: 10.1098/rsbm.1982.0008. JSTOR: 769897.
Lennard-Jones, J. E «The electronic structure of some diatomic molecules». Transactions of the Faraday Society, 25, 1929, pàg. 665 - 668. DOI: 10.1039/TF9292500668.
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Longuet-Higgins, H. C «Some Studies in Molecular Orbital Theory I. Resonance Structures and Molecular Orbitals in Unsaturated Hydrocarbons». The Journal of Chemical Physics, 18, (3), 1950, pàg. 261 - 265. Bibcode: 1950JChPh..18..265L. DOI: 10.1063/1.1747618.
Longuet-Higgins, H. C «Some Studies in Molecular Orbital Theory I. Resonance Structures and Molecular Orbitals in Unsaturated Hydrocarbons». The Journal of Chemical Physics, 18, (3), 1950, pàg. 261 - 265. Bibcode: 1950JChPh..18..265L. DOI: 10.1063/1.1747618.
jstor.org
Hartmann, H.; Longuet-Higgins, H. C «Erich Hückel. 9 August 1896-16 February 1980». Biographical Memoirs of Fellows of the Royal Society, 28, 1982, pàg. 152. DOI: 10.1098/rsbm.1982.0008. JSTOR: 769897.