Ghosh, M. S. “Formulation and Evaluation of Hydroxyzine Hydrochloride Sustained Release Microspheres by Ionotropic Gelation Technique Using Carbopol 934P”. Asian Journal of Pharmaceutics (AJP), vol. 8, no. 4, Oct. 2014, pp. 230-6, doi:10.22377/ajp.v8i4.448.