1. I. C. Hunter, Theory and Design of Microwave Filters, Vol. 48 of IET Electromagnetic Waves Series (Cambridge Univ. Press, Cambridge, 2006).
2. M. A. Morgan, Reflectionless Filters (Artech House Microwave Library, Boston, London, 2017).
3. J.-S. Hong, Microstrip Filters for RF/Microwave Applications (Wiley, Hoboken, 2011).
4. B. A. Belyaev, A. A. Leksikov, and V. V. Tyurnev, J. Commun. Technol. Electron. 49, 1228 (2004).
5. A. A. Aleksandrovsky, B. A. Belyaev, and A. A. Leksikov, J. Commun. Technol. Electron. 48, 358 (2003).