Ribeiro, V.Q. et al. 2014. Size and shape of plots in experiments with sole and intercropped cowpea and maize crops. Pesquisa Agropecuaria Brasileira. 19, 11 (Apr. 2014), 1365–1371. DOI:https://doi.org/10.1590/S1678-3921.pab1984.v19.16177.