M. Mousapour and F. Shirini, “Synthesis of benzothiazole and benzimidazole derivatives via an eco-friendly method using piperazine immobilized on nano-ZnO-sulfuric acid as a powerful catalyst”, J. Nanostruct. Chem., vol. 13, no. 4 (August 2023), Oct. 2021, doi: 10.1007/s40097-021-00450-5.