НЕЛІН, Є. А.; ШУЛЬГА, А. В.; ЗІНГЕР, Я. Л. Delta models of oscillatory structures and passband filters. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, [S. l.], n. 73, p. 63-68, 2018. DOI: 10.20535/RADAP.2018.73.63-68. Disponível em: https://radap.kpi.ua/radiotechnique/article/view/1444. Acesso em: 1 may. 2024.