СТАШУК, В. Д. Conditions of existence and classification of the feedback in electronic circuits. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, [S. l.], n. 68, p. 13-18, 2017. DOI: 10.20535/RADAP.2017.68.13-18. Disponível em: http://radap.kpi.ua/radiotechnique/article/view/1377. Acesso em: 28 nov. 2021.