Ozoliņš, O., and Ģ. Ivanovs. “Realization of Optimal FBG Band–Pass Filters for High Speed HDWDM”. Elektronika ir Elektrotechnika 92, no. 4 (April 19, 2009): 41–44. Accessed January 23, 2026. https://eejournal.ktu.lt/index.php/elt/article/view/10224.