Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Chunzhao Liu and Hiroyuki Honda and Akira Ohshima,Development of Chitosan-Magnetite Aggregates Containing Nitrosomonas Europaea Cells for Nitrification Enhancement,Journal of bioscience and bioengineering,13891723,Suita : Society for Biotechnology,2000-05,89,5,420-425,https://cir.nii.ac.jp/crid/1523106605543020160,https://doi.org/10.1016/s1389-1723(00)89090-8