Nazarko, A. I., Timofeeva, J. F., Nelin, E. A., & Popsuj, V. I. (2009). Improvement of band selectivity of electromagnetic crystals. Technology and Design in Electronic Equipment, (6), 38-41. Retrieved from https://www.tkea.com.ua/index.php/journal/article/view/TKEA2009.6.38