OKWUOWULU, P. A. “Influence of Decreasing Minisett Weight and Intra-Row Spacing on the Coated Ginger Cv Taffin-Giwa”. Journal of Spices and Aromatic Crops, vol. 1, no. 1, June 1992, pp. 59-64, https://updatepublishing.com/journal/index.php/josac/article/view/4288.