Jørgensen, J. N., & Varga, S. (2011). Norms and practices of polylingual behaviour: a sociolinguistic model. Eesti Ja Soome-Ugri Keeleteaduse Ajakiri. Journal of Estonian and Finno-Ugric Linguistics, 2(2), 49-68. https://doi.org/10.12697/jeful.2011.2.2.03