Ashcraft, M. H., & Moore, A. M. (2009). Mathematics anxiety and the affective drop in performance. Journal of Psychoeducational Assessment, 27(3), 197–205.
Barari, N., E`lāmi, F., Rezaei Zadeh, M., & Khorasani, A. (2018). Evaluation of higher-level learning objectives in e-learning environments (standards and indicators). Quarterly Journal of Instruction and Evaluation, 12(45), 25-39. [In Persian]