Ebbinghaus' forgetting curve and review cycle.

What is the Ebbinghaus Forgetting Curve & How to Boost Memory

What is the forgetting curve? - FourWeekMBA

Replication and Analysis of Ebbinghaus' Forgetting Curve

Improving Learning Outcomes through Spaced Repetition, by Miruna Cristus, Sana Labs

Forgetting Curve & Microlearning

Interval method (goerudio.com)

The 10 Ways to Ace Employee Reskilling and Upskilling - Actimo

What is the forgetting curve? How do you use it to improve your memory? - Quora

Forgetting Curve - an overview

Forgetting curve - Wikipedia

What is the Forgetting Curve? - Food Safe Passport