Multi-element determination of calcium, potassium and magnesium in medicinal plant by high-resolution continuum source atomic absorption spectrometry - Silva, Tiago Varão; Rego, Jardes Figueredo do; Moraes, Mercede de; Cavalheiro, Alberto José [UNESP]; Gomes Neto, José Anchieta [UNESP] (My University, 2012)