1. Bates
Douglas
Maechler
Martin
Bolker
Ben
Walker
Steven
. 2014. lme4: Linear mixed-effects models using Eigen and S4. R package. Version 1.0-6. https://github.com/lme4/lme4/.
2. Becker
Kara
, ed. 2019. The Low-Back-Merger Shift: Uniting the Canadian Vowel Shift, the California Vowel Shift, and the Short Front Vowel Shifts across North America. Publication of the American Dialect Society 104. Durham, N.C.: Duke University Press. https://read.dukeupress.edu/pads/issue/104/1.
3. Berkson
Kelly
Davis
Stuart
Strickler
Alyssa
. 2017. “What Does Incipient /ay/- Raising Look Like? A Response to Josef Fruehwald.” Language93, no. 3 (Sept.): e181–91. https://doi.org/10.1353/lan.2017.0050.