C. Fermüller, P. Hajek:
"A Conversation About Fuzzy Logic and Vagueness";
in: "Understanding Vagueness. Logical, Philosophical and Linguistic Perspectives", P. Cintula, C. Fermüller et al. (ed.); College Publications, London, 2011, ISBN: 978-1-84890-037-0, 405 - 416.
http://publik.tuwien.ac.at/files/PubDat_206476.pdf