References :

Council of Europe (2001). Common European Framework of Reference for Languages, Learning, Teaching, Assessment.Cambridge, CUP.

Hoven, D. (1999). A model for listening and viewing comprehension in multimedia environments. Language Learning & Technology, Vol. 3, No. 1, July 1999, pp. 88-103.

Krashen, S. (1985). The Input Hypothesis: Issues and Implications. London, Longman.

Ministerio de Educación, Cultura y Deporte (2003). Marco común europeo de referencia para las lenguas: Aprendizaje, enseñanza, evaluación. Madrid, ANAYA. The document is available on http://cvc.cervantes.es/obref/marco/

Schmidt, R. (1990). The role of consciousness in second language learning. Applied Linguistics, 11:129-158.

Skehan, P. (1988). A Cognitive Approach to Learning Language. Oxford, OUP.