De Santis, A., K. Sannicandro, C. Bellini, and T. Minerva. “Trends in the Use of Multivariate Analysis 
in Educational Research: A Review of Methods and Applications 
in 2018-2022”. Journal of E-Learning and Knowledge Society, Vol. 20, no. 1, June 2024, pp. 47-55, doi:10.20368/1971-8829/1135946.