B. , J. Baumeister, H. P. Wilson, and K. , Virtual seminars in European studies. A model for collaborative learning" en los procedimientos para la Conferencia ICDE en Viena, CD-ROM, vol.12, 1999.

B. , J. Baumeister, H. P. Wilson, and K. , Collaboration as a challenge: New learning environments embedded in old traditions" en los procedimentos de EUNIS 99Information technology shaping european universities, pp.254-260, 1999.

B. and J. M. Otros, Les coûts de l'enseignement dans le superieur, 1993.

D. , C. Turrini, and M. , Economics of flexible and distance learning, 1994.

D. , C. Zucchini, and I. , Economic and organisational issues in the transnational development and delivery of ODL courses, En: Research perspectives on Open Distance Learning, 1998.

V. Den-branden, J. Bang, and J. , ODL, ICT and the HUMANITIES model". En: Beyond HUMANITIES, long term strategy for ODL in university environments and virtual mobility (p. 17-33) Bruselas: Coimbra Group, 1998.