Левандовський, В.Г. “Method for Engineering of Refraction Index Profile of Circular Crosssection Waveguide”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia0, no. 39 (October 11, 2009): 98-103. Accessed May 3, 2024. https://radap.kpi.ua/radiotechnique/article/view/258.