Li, Chun; Li, Jason; Li, Jieming: 'Mutual capacitor and its applications', The Journal of Engineering, 2014, 2014, (6), p. 305-311, DOI: 10.1049/joe.2013.0148
IET Digital Library, https://digital-library.theiet.org/;jsessionid=2cipea2veflap.x-iet-live-01content/journals/10.1049/joe.2013.0148