Qian, K. et al. 2015. Nano ZnO Catalyzed One-Pot Synthesis of Benzimidazoles from o-Phenylenediamine with Aldehydes. Asian Journal of Chemistry. 27, 11 (Jul. 2015), 4045–4048. DOI:https://doi.org/10.14233/ajchem.2015.19076.