Maleki, B. and Salehabadi, H. (2010) “Ammonium chloride; as a mild and efficient catalyst for the synthesis of some 2-arylbenzothiazoles and bisbenzothiazole derivatives”, European Journal of Chemistry, 1(4), pp. 377–380. doi: 10.5155/eurjchem.1.4.377-380.165.