Дубровка, Ф., and В. Баньковський. “Radiation Characteristics of Novel ‘ring-in-cone’ Antenna”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 42, May 2010, pp. 46-50, doi:10.20535/RADAP.2010.42.46-50.