1. Literacy and numeracy;Baker,1998
2. On defining and developing literacy across communities;Bernardo;International Review of Education,2000
3. The measurement of adult literacy in theory and in practice;Darcovich;International Review of Education,2000
4. Definition and Selection of Competencies (DeSeCo) (2002). Additional Expert Opinions. DeSeCo Expert Report, Swiss Federal Statistical Office, Neuchâtel (retrieved on June 12, 2002 on the World Wide Web): http://www.statistik.admin.ch/stat_ch/ber15/deseco/deseco_int02.htm.
5. Doronila, M. L. C. (1996). Landscapes of literacy: An ethnographical study of functional literacy in marginal Philippine communities. Hamburg: UNESCO Institute for Education, London: Luzac Oriental.