Kang, Ki-sung, and Dea-wha Soh. “Fabrication of Optical Modulator Based on Proton Exchange”. Eurasian Chemico-Technological Journal 2, no. 2 (June 12, 2000): 175–180. Accessed July 5, 2024. https://ect-journal.kz/index.php/ectj/article/view/38.