9843 Peter Fishburn/Fred Roberts: Uniqueness in finite measurement.
In 4620 Roberts, 103-137.

9844 Bernhard Ganter/Rudolf Wille: Conceptual scaling.
In 4620 Roberts, 139-167.

9849 Fred Roberts: Meaningless statements, matching experiments, and
colored digraphs. In 4620 Roberts, 277-294.

10359 Uta Wille: The role of synthetic geometry in representational
measurement theory. TU Berlin Report 1996/504 (1996).