Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Danladi Mahuta Sahabi and Minoru Takeda and Ichiro Suzuki,"Removal of Mn[2+] from water by ""aged"" biofilter media: the role of catalytic oxides layers",Journal of bioscience and bioengineering,13891723,Suita : Society for Biotechnology,2009-02,107,2,151-157,https://cir.nii.ac.jp/crid/1523388080525688576,https://doi.org/10.1016/j.jbiosc.2008.10.013