19183 Ulrich Höhle: Fuzzy sets and sheaves I. Basic concepts.
Fuzzy Sets Systems 158 (2007), 1143-1174.

19184 Ulrich Höhle: Fuzzy sets and sheaves II. Sheaf-theoretic foundations
of fuzzy set theory with applications to algebra and topology.
Fuzzy Sets Systems 158 (2007), 1175-1212.