Mills, I. (1961) Errors in "Wavefunctions for the methane molecule". Molecular Physics, 4 (1). pp. 57-59. ISSN 1362-3028 doi: https://doi.org/10.1080/00268976100100071

Mills, I. (1961) Vibrational perturbation theory. Journal of Molecular Spectroscopy, 5 (1-6). pp. 334-340. ISSN 0022-2852 doi: https://doi.org/10.1016/0022-2852(61)90098-4