Нелін, Є. А., А. В. Шульга, and Я. Л. Зінгер. “Delta Models of Oscillatory Structures and Passband Filters”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia0, no. 73 (June 30, 2018): 63-68. Accessed December 4, 2024. https://radap.kpi.ua/radiotechnique/article/view/1444.