Krishnamurthi, P., and S. Balamuralikrishnan. “FT-IR Spectroscopic Studies of Donor-Acceptor (OH···N and OH··&Middot;O) Complexes”. Asian Journal of Chemistry, vol. 22, no. 7, June 2010, pp. 5144-8, https://asianpubs.org/index.php/ajchem/article/view/11726.