Bernhardt, Barbara May, D. Ignatova, W. Amoako, N. Aspinall, S. Marinova-Todd, J. P. Stemberger, and K. Yokota. 2019. “Bulgarian Consonant Acquisition in Preschoolers With Typical Versus Protracted Phonological Development”. Journal of Monolingual and Bilingual Speech 1 (2): 143–181. https://doi.org/10.1558/jmbs.v1i2.11801.