M. G. da Silva, I. de S. Oliveira, F. F. do Carmo, E. R. F. Lêdo, and J. A. da Silva Filho, “REFERENCE EVAPOTRANSPIRATION ESTIMATED BY HARGREAVES-SAMANI IN THE STATE OF CEARÁ, BRAZIL”, Braz J Biosyst Eng, vol. 9, no. 2, pp. 132–141, Jun. 2015.