16295 Dietrich Albert (ed.): Knowledge structures. Springer 1994.

16497 Dietrich Albert/Josef Lukas (ed.): Knowledge spaces. Erlbaum 1999, 230p. $60.

29015 Hans van Ditmarsch/Eric Goubault/Jeremy Ledent/Sergio Rajsbaum: Knowledge and
simplicial complexes. Arxiv 2002.08863 (2020), 43p.

16126 Jean-Paul Doignon/Jean-Claude Falmagne: Knowledge spaces.
Springer 1999, 330p. Eur 70. Knowledge spaces are exact neighbourhood
spaces or, equivalently, exact closure spaces (topological spaces in the
general sense of Sierpinski or Nöbeling, i.e., one does not require that
the intersection of open sets is again open). Why not say it?
There are definitely too many new books and articles in computer science
which neglect beautiful old mathematical theories. The price makes one
not happier.

28794 Jean-Paul Doignon/Jean-Claude Falmagne: Knowledge spaces and
learning spaces. Arxiv 1511.06757 (2015), 51p.

29018 Cord Hockemeyer: Using the basis of a knowledge space for determining
the fringe of a knowledge state. J. Math. Psychol. 41 (1997), 275-279.

16293 Ali Ünlü/Silke Brandt/Dietrich Albert: Test surmise relations, test
knowledge structures, and their characterizations. Internet 2004, 59p.