Sangodiah, A., T. Jee San, Y. Tien Fui, L. Ean Heng, R. K. Ayyasamy, and N. A Jalil. “Identifying Optimal Baseline Variant of Unsupervised Term Weighting in Question Classification Based on Bloom Taxonomy”. MENDEL, Vol. 28, no. 1, June 2022, pp. 8-22, doi:10.13164/mendel.2022.1.008.