Curi, Paulo Roberto, et al. “Multivariate Analysis of <i>Per capita< i> Availability of Nutrients in 44 Countries”. Pesquisa Agropecuaria Brasileira, vol. 27, no. 8, Aug. 1992, pp. 1123-8, doi:10.1590/S1678-3921.pab1992.v27.3750.