Нелін , Є. А., and Ю. В. Непочатих. “Bandpass Filters on Orthogonal Resonators”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 90 (December 30, 2022): 31-36. Accessed February 22, 2024. https://radap.kpi.ua/radiotechnique/article/view/1882.