Горб, Н., and Е. Гусева. “Application of Eigenfunction Expansion Method to the Microwave Tomography”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 59, Dec. 2014, pp. 121-9, doi:10.20535/RADAP.2014.59.121-129.