HU, QI-SHAN, et al. “Study of Density Functional Theory on Hydrogen Bonding Interaction of 7-Hydroxyquinoline-(MeOH)n (n = 1,2)”. Asian Journal of Chemistry, vol. 20, no. 3, Mar. 2010, pp. 2133-40, https://asianpubs.org/index.php/ajchem/article/view/19218.