Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hirayama Hideki and Kyono Takashi and Akita Katsushi and Nakamura Takao and Ishibashi Koji,High-Efficiency UV LEDs using Quaternary InAlGaN,"IEEJ Transactions on Electronics, Information and Systems",03854221,The Institute of Electrical Engineers of Japan,2005,125,2,225-232,https://cir.nii.ac.jp/crid/1390282679580651776,https://doi.org/10.1541/ieejeiss.125.225