Chen, Baodi, and Jierong Wu. “Promotive Effect of Psychological Intervention on English Vocabulary Teaching Based on Hybrid Collaborative Recommender Technology”. International Journal of Emerging Technologies in Learning (iJET) 14, no. 15 (August 1, 2019): pp. 14–24. Accessed January 16, 2022. https://online-journals.org/index.php/i-jet/article/view/11185.