References: Ahmed, V.A., & Goli, D. (2018). Development and Characterization of In Situ Gel of Xanthan Gum for Ophthalmic Formulation Containing Brimonidine Tartrate. Asian Journal of Pharmaceutical and Clinical Research, 11(7), 277-284. https://doi.org/10.22159/ajpcr.2018.v11i7.25221 Ahuja, M., Kumar, A., & Singh, K. (2012). Synthesis, characterization