Putra, I.M.W.A., I.G.A.W. Kusumawati, and A.W. Permadi. 2019. “Modification of Clinoptilolite With Benzalkonium Chloride As a Carrier of Metformin Hydrochloride”. Asian Journal of Chemistry 31 (6):1275-78. https://doi.org/10.14233/ajchem.2019.21887.