Richter T, Kretschmer T, Stracke CM, Bruce A, Hoel T, Megalou E, Mazar I, Sotirou S. OPEN EDUCATIONAL RESOURCES IN THE CONTEXT OF SCHOOL EDUCATION: BARRIERS AND POSSIBLE SOLUTIONS. ESJ [Internet]. 2014Jul.30 [cited 2024Apr.18];10(19). Available from: https://eujournal.org/index.php/esj/article/view/3782