@article{article72ca50fd,
title   = {Estimation of the potential evapotranspiration by a simplified penman method},
author = {Villa Nova, Nílson Augusto and Miranda, Jarbas Honorio de and Pereira, André B and Silva, Késia Oliveira da},
year = {2006},
doi = {10.1590/S0100-69162006000300007},
journal   = {Engenharia Agrícola}
}