Chehlarova, N. (2025). Additive technologies in education. Thrakia University, DIPKU. p. 184, ISBN 978-954-691-112-4 (Print), ISBN 978-954-691-113-1 (Online). https://www.dipku-sz.net/A/B/Aditivni-tehnologii-v-obrazovanieto/?cMenuId=4
Tonediko
Chehlarova, N. (2025). Additive technologies in education. Thrakia University, DIPKU. p. 184, ISBN 978-954-691-112-4 (Print), ISBN 978-954-691-113-1 (Online). https://www.dipku-sz.net/A/B/Aditivni-tehnologii-v-obrazovanieto/?cMenuId=4
