Ribeiro de LimaM. T., KellyM. T., CabanisM.-T., CassanasG., MatosL., PinheiroJ., and BlaiseA. “Determination of Iron, Copper, Manganese and Zinc in the Soils, Grapes and Wines of the Azores”. OENO One, Vol. 38, no. 2, June 2004, pp. 109-18, doi:10.20870/oeno-one.2004.38.2.925.