Craioveanu R. Using two-dimensional box plots to visualize the vowel space: A study of rounded vowel allophones in Tigrinya. Canadian Acoustics [Internet]. 2011 Sep. 1 [cited 2024 Apr. 20];39(3):156-7. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2458