'Concepts and models for advanced designs' (Electromagnetic Waves, 2018), 'Slotted Waveguide Array Antennas: Theory, analysis and design', Chap. 8, pp. 175-220, DOI: 10.1049/SBEW517E_ch8
IET Digital Library, https://digital-library.theiet.org/;jsessionid=5klb0jan8878a.x-iet-live-01content/books/10.1049/sbew517e_ch8