2.5 Viitteet
Ketolainen, Ilkka, Minna Laakso & Susanna Simberg 2017. 16−17-vuotiaiden suomalaisnuorten puheäänen korkeus. Puhe & kieli 37(4): 259–
277. https://doi.org/10.23997/pk.60780
Levy Roger, Evelina Fedorenko & Edward Gibson 2013. The syntactic complexity of Russian relative clauses. Journal of Memory and Language 69: 461–
495. https://doi.org/10.1016/j.jml.2012.10.005
Sinnemäki, Kaius 2020. Linguistic system and sociolinguistic environment as competing factors in linguistic variation: A typological approach. Journal of Historical
Sociolinguistics 6(2): 20191010. https://doi.org/10.1515/jhsl-2019-1010
Sinnemäki, Kaius & Francesca Di Garbo 2018. Language structures may adapt to the sociolinguistic environment, but it matters what and how you count: A typological study of verbal and nominal complexity. Frontiers in Psychology 9:
1141. https://doi.org/10.3389/fpsyg.2018.01141