(en) Elizabeth Ligon Bjork et Robert Bjork, « Making Things Hard on Yourself, But in a Good Way: Creating Desirable Difficulties to Enhance Learning », M. A. Gernsbacher and J. Pomerantz (Eds.), Psychology and the real world: Essays illustrating fundamental contributions to society (2nd edition). New York: Worth., , p. 59-68 (lire en ligne)
