Cook, G. (1994). Repetition and learning by heart: an aspect of intimate discourse, and its implications. ELT Journal, 48(2), 133-141.
Gass, S., Mackey, A., Alvarez-Torres, M.J., and Fernandez-Garcia, M.F. (1999). The effects of task repetition on linguistic output. Language Learning, 49(4), 549-581.
Nation, I. S. (1975). Motivation, repetition, and language-teaching techniques. ELT Journal, 29(2), 115-120.
Nation, P. (1989). Improving speaking fluency. System, 17(3), 377-384.
Tam, F. M. (1997). Building fluency: A course for non-native speakers of English. English Teaching Forum, 35(1), 26.