Chukharev-Hudilainen, Evgeny, and Tatiana A. Klepikova. “The Effectiveness of Computer-Based Spaced Repetition in Foreign Language Vocabulary Instruction: A Double-Blind Study”. CALICO Journal 33, no. 3 (August 26, 2016): 334–354. Accessed October 6, 2024. https://journal.equinoxpub.com/Calico/article/view/7667.