D. Albert and J. Lukas, Knowledge spaces: theories, empirical research, applications, 1999.

D. Albert and R. Kaluscha, Adapting knowledge structures in dynamic domains Beiträge zum Achten Arbeitstreffender GI-Fachgruppe, q.q, Intelligente Lehr, pp.89-100, 1997.

D. Albert and C. Hockemeyer, Dynamic and adaptive hypertext tutoring systems based on knowledge space theory Artificial intelligence in education: knowledge and media in learning systems, Frontiers in Artificial Intelligence and Applications, vol.39, pp.553-555, 1997.

G. Birkhoff, Lattice theory, 1967.
DOI : 10.1090/coll/025

J. P. Doignon, Knowledge Spaces and Skill Assignments, Contributions to Mathematical Psychology, Psychometrics, and Methodology, pp.111-121, 1994.
DOI : 10.1007/978-1-4612-4308-3_8

J. Doignon and J. Falmagne, Spaces for the assessment of knowledge, International Journal of Man-Machine Studies, vol.23, issue.2, pp.175-196, 1985.
DOI : 10.1016/S0020-7373(85)80031-6

J. Doignon and J. Falmagne, Knowledge spaces, 1999.

C. E. Dowling, Applying the Basis of a Knowledge Space for Controlling the Questioning of an Expert, Journal of Mathematical Psychology, vol.37, issue.1, pp.21-48, 1993.
DOI : 10.1006/jmps.1993.1002

I. Düntsch and G. Gediga, Skills and knowledge structures???, British Journal of Mathematical and Statistical Psychology, vol.48, issue.1, pp.9-27, 1995.
DOI : 10.1111/j.2044-8317.1995.tb01047.x

J. Falmagne and J. Doignon, A class of stochastic procedures for the assessment of knowledge, British Journal of Mathematical and Statistical Psychology, vol.41, issue.1, pp.1-23, 1988.
DOI : 10.1111/j.2044-8317.1988.tb00884.x

C. Hockemeyer, T. Held, A. , and D. , RATH ---a relational adaptive tutoring hypertext WWW-environment based on knowledge space theory, CALISCE`98: Proceedings of the Fourth International Conference on Computer Aided Learning in Science and Engineering, pp.417-423, 1998.

M. Koppen, Extracting Human Expertise for Constructing Knowledge Spaces: An Algorithm, Journal of Mathematical Psychology, vol.37, issue.1, pp.1-20, 1993.
DOI : 10.1006/jmps.1993.1001

M. Koppen and J. Doignon, How to build a knowledge space by querying an expert, Journal of Mathematical Psychology, vol.34, issue.3, pp.311-331, 1990.
DOI : 10.1016/0022-2496(90)90035-8

K. Korossy, Modellierung von Wissen als Kompetenz und Performanz [Modeling knowledge as competence and performance]. Inauguraldissertation, Fakultät für Sozial--und Verhaltenswissenschaften, 1993.

P. Ritrovato, How to use the GRID Technology for building the next generation of learning environments, Paper presented at the LeGE Work Group 2 nd Workshop, pp.3-4, 2003.

L. Stefanutti and M. Koppen, A procedure for the incremental construction of a knowledge space, Journal of Mathematical Psychology, vol.47, issue.3, 2003.
DOI : 10.1016/S0022-2496(02)00022-6

J. S. Übersax, Statistical Modeling of Expert Ratings on Medical Treatment Appropriateness, Journal of the American Statistical Association, vol.49, issue.422, pp.421-427, 1993.
DOI : 10.1016/0895-4356(88)90110-2