Zhuk, S. Ya., M. Y. Omelianenko, T. V. Romanenko, and O. V. Tureeva. “Synthesis of Extremely Wide Stopband E-Plane Bandpass Filters”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 84 (March 30, 2021): 22-29. Accessed May 9, 2021. http://radap.kpi.ua/radiotechnique/article/view/1715.