What are the drawbacks of spaced repetition system? - Quora
How Spaced Repetition Enhances Learning - SDN
psychology of forgetting
Combatting the Forgetting Curve - Performance Matters Inc.
5 Ways to Challenge the Forgetting Curve - LearnUpon
Ebbinghaus's Forgetting Curve - Why We Keep Forgetting and What We Can Do About It
Mastering Your Memory: The Power of Spaced Repetition and Retrieval Practice, by Samarjeet Kumar Singh
Spaced review and learning reinforcement
2 PDF
The Curve of Forgetting – SimonBaddeley64
Education Theory Made Practical – Volume 2, Part 3: Spaced Repetition Theory – ICE Blog