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Cysne, J.B.; Canuto, K.M.; Pessoa, O.D.L.; Nunes, E.P.; Silveira, E.R., Leaf essential oils of four Piper species from the State of Ceará - Northeast of Brazil, J. Braz. Chem. Soc., 2005, 16, 6B, 1378-1381, https://doi.org/10.1590/S0103-50532005000800012 . [all data]