Μπαλή Ε.; Κοκόλης Α.; Παπούλια Α.-Κ. Τα ξαδέρφια της...Γης!. Open Schools Journal for Open Science, [S. l.], v. 2, n. 1, p. 26–33, 2019. DOI: 10.12681/osj.19330. Disponível em: https://ejournals.epublishing.ekt.gr/index.php/openschoolsjournal/article/view/19330. Acesso em: 6 may. 2024.