@inproceedings{inproceedingsf94bfc29,
title   = {Four configurations of small photovoltaic pumping systems},
author = {Fedrizzi, Maria Cristina and Zilles, Roberto and Ribeiro, Fernando Selles},
year = {2009},
publisher = {OTTI},
booktitle   = {Symposium Small PV-Applications rural electrification and commercial use}
}