Idris, S.K., Hazura H., Hanim A.R., A.S. M.Zain, and F. Salehuddin. 2016. “SiGe Optical Modulator With NPN Configuration Over Varies Doping Type”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 8 (4):157-60. https://jtec.utem.edu.my/jtec/article/view/1192.