D. Balšaitytė and V. Kodzis, “Quantitative Reduction of Vowel Graph ‘a’ and ‘o’ Positioned after the Hard Consonants in the Speech of Native and Non-Native Russian Speakers in Lithuania”, RePhi, no. 27 (32), pp. 198–208, Apr. 2015, doi: 10.15388/RESPECTUS.2015.27.32.19.