@article{lejpt22071,
 author={Andreotti, A. and Assante, D. and Rizzo, R. and Pierno, A.},
 year={2013},
 title={Characteristic Impedance of Periodically Grounded Power Lines},
 journal={Leonardo Electron. J. Pract. Technol.},
 volume={12},
 number={22},
 pages={71-82},
 url={http://lejpt.academicdirect.org/A22/071_082.pdf}
}