NAKATA, T. Implementing optimal spaced learning for English vocabulary learning: Towards improvement of the low-first method derived from the reactivation theory. The JALT CALL Journal, Melbourne, Australia, v. 2, n. 2, p. 19–36, 2006. DOI: 10.29140/jaltcall.v2n2.24. Disponível em: https://www.castledown.com.au/journals/jaltcall/article/view/jaltcall.v2n2.24. Acesso em: 22 sep. 2026.