Nazarko, A. I., Ju. F. Timofeeva, E. A. Nelin, and V. I. Popsuj. 2009. “Improvement of Band Selectivity of Electromagnetic Crystals”. Technology and Design in Electronic Equipment, no. 6 (December), 38-41. https://www.tkea.com.ua/index.php/journal/article/view/TKEA2009.6.38.