Jazbutis, O. R., M. Wiseheart, G. A. Radvansky, and N. M. McNeil. “Distributed Practice and Time Pressure Interact to Affect Learning and Retention of Arithmetic Facts”. Journal of Numerical Cognition, Vol. 9, no. 2, July 2023, p. Article e7721, doi:10.5964/jnc.7721.