11. Références:

Bork86 Bork, Alfred; Weinstock, Harold; editors
       Designing Computer Based Learning Material,
       Springer-Verlag, 1986.  

Ibra85 Ibrahim, Bertrand; Kühni, Crhistiane.
       Online Supervision of CBL through LANs,
       Education & Computing 1985, vol 1 No 4, pp 243-247,
       North Holland, 1986.  

Ibra88 Ibrahim, Bertrand.
       Portability Aspects for Raster Graphics on Microcomputers,
       34th ISMM International Conference: Mini and
       MicroComputers, Lugano, June 29 - July 1, 1987, pp 15-18.  

Sche86 Scheifler, R.W.; Getty, J.
       The X Window System,
       ACM transactions on Graphics, Vol 5 No 2, April 1986,
       pp 79-109.