Keykha, F., Hashemi, S. H., Kaykhaii, M., & Jamali Keikha, A. "Modified graphene oxide for micro-solid phase extraction of ciprofloxacin from seawater employing chemometrics optimization", Iranian Journal of Chemistry, 5, 1, 2022, 67–74. doi: 10.22036/cr.2022.320353.1166