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- https://www.researchgate.net/profile/Emmanuel-Fokides/publication/309935390_Trisdiastata_ekpaideutika_paichnidia_sobara_paichnidia/links/5864c3e408ae8fce490c1876/Trisdiastata-ekpaideutika-paichnidia-sobara-paichnidia.pdf
- file:///C:/Users/maria/Downloads/3946-1-10074-1-10-20220123.pdf
- https://epinoisi.ntlab.gr/docs/papers/CGES2009.pdf
- file:///C:/Users/maria/Downloads/6577321e4bd24.pdf
- http://acikders.atauni.edu.tr/pluginfile.php/75303/mod_resource/content/1/GameBasedLearning_V2_1.pdf