Širiakovienė, Asta. “Extracurricular Vocational Training (1947-1989)”. Acta Paedagogica Vilnensia 2 (December 28, 1993): 46–56. Accessed October 26, 2025. https://test.zurnalai.vu.lt/acta-paedagogica-vilnensia/article/view/9365.