@article{lejpt22027,
 author={Rizzo, R.},
 year={2013},
 title={Direct Current Smart Micro-grids for Distributed Generation with Renewable Sources},
 journal={Leonardo Electron. J. Pract. Technol.},
 volume={12},
 number={22},
 pages={27-42},
 url={http://lejpt.academicdirect.org/A22/027_042.pdf}
}