Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Katsunori Kawanishi and Tsubasa Kanamori and Yutaka Katsuyama and Osanori Koyama,"Web-based refractive index monitoring system, employing LPG-FBG hybrid optical sensors",SPIE Proceedings,0277-786X,SPIE,2012-10-17,8421,,8421B8-8421B8,https://cir.nii.ac.jp/crid/1872553967610145408,https://doi.org/10.1117/12.974909