Sofronieva, Ekaterina, and Todor Shopov. “The Swing of the Pendulum – Objectivism or Constructivism in Language Education?”. Multidisciplinary Journal of School Education 1, no. 2 (2) (December 20, 2012). Accessed May 7, 2024. https://czasopisma.ignatianum.edu.pl/jpe/article/view/1261.