Liens
[1] https://lfh.edu.gr/print/1574
[2] https://lfh.edu.gr/printpdf/1574
[3] https://lfh.edu.gr/sites/default/files/docs/yliko_ana_mathima_lykeio_2019_-_20.pdf
[4] https://lfh.edu.gr/sites/default/files/docs/gia_tin_pliroforiki_toy_lykeioy.pdf