Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TSUJITA W.,Gas sensor network for air-pollution monitoring,Sensors and Actuators B,0925-4005,Elsevier BV,2005,110,,304-311,https://cir.nii.ac.jp/crid/1570572701179988096,https://doi.org/10.1016/j.snb.2005.02.008