1. Content validity and reliability of single items or questionnaires;Aiken;Educ. Psychol. Meas.,1980
2. L’analyse de contenu;Bardin,2013
3. Teaching and Assessing Intercultural Communication Competence;Byram,1997
4. La spécification de la problématique;Chevrier,2009
5. A Matter of Opinion: the Delphi Method in the Social Sciences;Daniels,2017