1. Strategic use of e-learning for human resource training;Capece;International Journal of Economics and Business Research,2009
2. Comisión de las Comunidades Europeas (2006). Comunicación de la Comisión: Aprendizaje de adultos: Nunca es demasiado tarde para aprender. Retrieved at: http://www.mec.es/educa/sistema-educativo/eadul/files/2007-nunca-demasiado-tarde-aprender.pdf.
3. Comisión Europea (2013). Programa Marco Europeo Horizonte 2020. Retrieved at: http://ec.europa.eu/programmes/horizon2020/en/.
4. Cubo, S., Reis, A., Yuste, R., Arias, J. (2012). Synchronous virtual classrooms. Implementation at the University of Extremadura (Spain): technological and pedagogical aspects. The European Conference on Educational Research, Cádiz, Spain, paper network 16. .
5. Online Learning 2.0: Strategies for a Mature Market;Gallagher;Continuing Higher Education Review,2012