Остроумов, І. В. “Availability Estimation of Navigation Aids”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia0, no. 69 (July 1, 2017): 35-40. Accessed November 23, 2024. https://radap.kpi.ua/radiotechnique/article/view/1398.