Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Suzuki Makoto and Hirasawa Shigeichi,Text Classification Using the Sum of Frequency Ratios of Word andN-gram Over Categories,"IEEJ Transactions on Electronics, Information and Systems",03854221,The Institute of Electrical Engineers of Japan,2009,129,1,118-124,https://cir.nii.ac.jp/crid/1390282679581925504,https://doi.org/10.1541/ieejeiss.129.118