References
- Abrams, D. M., & Strogatz, S. H. (2003). Modeling the dynamics of language death. Nature, 424(6951), 900. doi:10.1038/424900a
- Baggs, I., & Freedman, H. I. (1990). A mathematical model for the dynamics of interactions between a unilingual and a bilingual population: Persistence versus extinction. The Journal of Mathematical Sociology, 16(1), 51–75. doi:10.1080/0022250X.1990.9990078
- Baggs, I., & Freedman, H. I. (1991). Convergence to equilibria in general models of unilingual-bilingual interactions. In S. Busenberg, & M. Martelli (Eds.), Lecture notes in biomathematics vol. 92, “Differential equations models in biology, epidemiology and ecology”. Berlin: Springer-Verlag.
- Baggs, I., & Freedman, H. I. (1993). Can the speakers of a dominated language survive as unilinguals?: A mathematical model of bilingualism. Mathematical Computational Modelling, 18(6), 9–18. doi:10.1016/0895-7177(93)90122-F
- Baker, C., & Prys Jones, S. (1998). Encyclopedia of bilingualism and bilingual education. Clevedon, Avon, UK: Multilingual Matters.
- Baker, C. A. (2007). A parents’ and teachers’ guide to bilingualism (Third ed.). Clevedon, UK: Multilingual Matters.
- Bass, F. (1969). A new product growth for model consumer durables. Management Science, 15(5), 215227. doi:10.1287/mnsc.15.5.215
- The Censuses of 1991-2011. (1991, 2001, 2011). Office of population censuses and surveys. H.M. Stationery Office.
- Harshav, B. (2009). Flowers have no names: The revival of Hebrew as a living language after two thousand years was no miracle. Natural History, 118, 2429.
- Jones, H. (2012). A statistical overview of the Welsh language. Cardiff: Welsh Language Commissioner. Available at http://www.comisiynyddygymraeg.cymru/English/Policy, Kandler et al2008ka:02
- Kandler, A., & Steele, J. (2008). Ecological models of language competition. Biological Theory, 3(2), 164–173. doi:10.1162/biot.2008.3.2.164
- Kandler, A., Unger, R., & Steele, J. (2010). Language shift, bilingualism and the future of Britain’s Celtic languages. Philosophical Transactions of the Royal Society B: Biological Sciences 365 (1559), 365, 3855–3864. doi:10.1098/rstb.2010.0051
- Krauss, M. (1992). The world’s languages in crisis. Language. 68(1), 4–10.
- Office for National Statistics (a). (2016a) Internet access households and individuals: 2016, Figure 13. Retrieved 2017, August 11, from https://www.ons.gov.uk/peoplepopulationandcommunity/householdcharacteristics/homeinternetandsocialmediausage/bulletins/internetaccesshouseholdsandindividuals/2016#growth-in-online-shopping
- Office for National Statistics (b). (2016b) Statistical bulletin: Family spending in the UK: Financial year ending March 2016, Figure 10. Retrieved 2017, August 11, from https://www.ons.gov.uk/peoplepopulationandcommunity/personalandhouseholdfinances/expenditure/bulletins/familyspendingintheuk/financialyearendingmarch2016
- ONS, NOMIS (2011) The annual population survey. Retrieved 2017, August 11, from https://www.nomisweb.co.uk/articles/676.aspx
- Welsh Assembly Government. (2013). Welsh language technology and digital media action plan (2013). Cardiff: Welsh Language Commissioner. Accessed: 3 August 2017 http://wales.gov.uk/docs/dcells/publications/230513-action-plan-en.pdf
- Welsh Assembly Government. (2015). National survey for Wales, 201314: Welsh language use survey (2015). Cardiff: Welsh Language Commissioner. Accessed: 4 August 2017 www.gov.wales/docs/statistics/2015/150129-welsh-language-use-survey-en.pdf
- Welsh Assembly Government. (2017). Cymraeg 2050: A million Welsh speakers. Cardiff: Welsh Language Commissioner. Retrieved 2017, August 3, from http://gov.wales/topics/welshlanguage/welsh-language-strategy-and-policies/cymraeg-2050-welsh-language-strategy/?lang=en
- Welsh Assembly Government and Welsh Language Commissioner. (2015a). National survey for Wales, 201314: Welsh language use survey (2015). Cardiff: Welsh Language Commissioner. Retrieved 2017, August 4, from www.gov.wales/docs/statistics/2015/150129-welsh-language-use-survey-en.pdf
- Welsh Assembly Government and Welsh Language Commissioner. (2015b). Welsh language use in Wales 201315. Cardiff: Welsh Language Commissioner. Retrieved 2017, August 4 from, http://gov.wales/statistics-and-research/Welsh-language-use-survey/?lang=en
- Williams, D., Cunliffe, D., Tudhope, D., & Vlachidis, A. (2017). Welsh natural language toolkit. Retrieved from https://sourceforge.net/projects/wnlt-project/
- Wyburn, J., & Hayward, J. (2008). The future of bilingualism: An application of the Baggs and Freedman model. The Journal of Mathematical Sociology, 32, 267–284. doi:10.1080/00222500802352634
- Wyburn, J., & Hayward, J. (2009). OR and language planning: Modelling the interaction between unilingual and bilingual populations. Journal of the Operational Research Society, 60, 626–636. doi:10.1057/palgrave.jors.2602600