“SECOND LANGUAGE VOCABULARY ACQUISITION UNDER TWO DIFFERENT TYPES OF INSTRUCTION: THE EFFECTS OF CONCENTRATED AND DISTRIBUTED INTRODUCTION IN IMMEDIATE AND DELAYED RETENTION”, ES Review, no. 36, pp. 7–26, May 2017, Accessed: Jan. 17, 2026. [Online]. Available: https://revistas.uva.es/index.php/esreview/article/view/734