Hivatkozások[1] https://isj2.educv.ro/sites/default/files/Regulament_olimp_de_bio_2011-2012.pdf [2] https://isj2.educv.ro/sites/default/files/precizari_SCS_2011-2012.pdf [3] https://isj2.educv.ro/categorie/Evenimente/Olimpiade-%C5%9Ecolare?language=hu