Setamdideh, Davood, et al. “Mild and Efficient Reduction of Organic Carbonyl Compounds to Their Corresponding Alcohols With Zn(BH4)2 Under Protic Condition”. Asian Journal of Chemistry, vol. 24, no. 8, Apr. 2012, pp. 3591-6, https://asianpubs.org/index.php/ajchem/article/view/9403.