Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Himeno Shuji and Takeya Kiwamu and Fujita Shoichi,Development of Biogas Separation Process Using DDR-Type Zeolite Membrane,KAGAKU KOGAKU RONBUNSHU,0386216X,"The Society of Chemical Engineers, Japan",2010,36,6,545-551,https://cir.nii.ac.jp/crid/1390001204513233024,https://doi.org/10.1252/kakoronbunshu.36.545