1. Introduction to Many Valued Logics;Ackermann,1967
2. Sur les operations definies pur les nombres reels;Aczel;Bull. Soc. Math. Française,1948
3. Remarks on the measurement of subjective probability and information;Aczel;Metrika,1966
4. Minimization of R-fuzzy automata;Adámek,1976
5. Elements of a theory of inexact measurement;Adams;Philos. Sci.,1965