Corrêa, P. C., G. H. H. Oliveira, P. L. Rodrigues, S. C. Campos, and F. M. Botelho. “Hygroscopic Equilibrium and Physical Properties Evaluation Affected by Parchment Presence of Coffee Grain”. Spanish Journal of Agricultural Research, Vol. 8, no. 3, Sept. 2010, pp. 694-02, doi:10.5424/sjar/2010083-1267.