1. Miniature dielectric-loaded personal telephone antennas with low user exposure
2. Fujimoto, K., and James, J.R.: ‘Mobile antenna systems handbook’, 2nd(Artech House Inc, Boston, USA 2001), p. 451–452 see Ceramic Chip antenna
3. Stratton, J.A.: ‘Electromagnetic theory’, (McGraw-Hill Inc, New York 1941),7 and 8,