Baykova, Olga, Olga Obukhova, and Galina Porchesku. “Intonation Contours in Spontaneous Speech of Russian Germans: An Experimental Study of German Language Islands”. Amazonia Investiga 8, no. 21 (August 31, 2019): 731–746. Accessed September 18, 2025. https://mail.amazoniainvestiga.info/index.php/amazonia/article/view/162.