Bozhilova, Vanya. “OPPORTUNITIES FOR FORMAL ADULT EDUCATION AND TRAINING IN BULGARIA – A DISCUSSION ON FLEXIBILITY AND PERMEABILITY OF THE SYSTEM”. KNOWLEDGE - International Journal 59, no. 2 (August 18, 2023): 135–140. Accessed July 16, 2024. https://ikm.mk/ojs/index.php/kij/article/view/6196.