M. A. C. de Lima, R. E. Alves, J. S. de Assis, H. A. C. Figueiras, and J. T. A. Costa, “Quality, phenols and oxidative enzymes of ’Itália’ grape under calcium influence, during ripening”, PAB, vol. 35, no. 12, pp. 2493–2499, Dec. 2000.