Jorge, L.I.F. , Ferro, V. de O. and Oliveira, I. de . 1994. The serralhas of Brasil: Emitia sonchifolia L., Sonchus asper (L.) Hill e Taraxacum ojJicinale Weber - compared microscopic examination. Instituto Adolfo Lutz Journal - RIAL. 54, 2 (Dec. 1994), 110–4. DOI:https://doi.org/10.53393/rial.1994.54.35701.