1. Balanskat, A., Vuorikari, R., 2000. Survey on School Educational Repositories (D 2.1). European Treasury Browser, European Schoolnet.
2. Trends and challenges of eLearning in national and international agricultural development;Berge;International Journal of Education and Development using Information and Communication Technology,2006
3. Bio@gro, 2005. Metadata Models for Bio@gro Content Objects (BCOs) Description. Bio@gro Technical Report.
4. Bueno-de-la-Fuente, G., Hernández-Pérez, T., Rodríguez-Mateos, D., Méndez-Rodríguez, E.M., Martín-Galán, B., 2009. Study on the use of metadata for digital learning objects in institutional university repositories (MODERI). Cataloging and Classification, Special Issue on Metadata and Repositories, 262–285, 47(3/4).
5. Cebeci, Z., Y Erdogan, Z., Kara, M., 2008. TrAgLor: A LOM-Based Digital Learning Objects Repository for Agriculture. Proc. of the 4th International Scientific Conference on “eLearning and Software for Education” (eLSE’08), Bucharest, Romania, 17–18 April. (http://traglor.cu.edu.tr/objects/pdf/Traglor-else08.pdf).