@inbook { 4415, title = {Fuzzy Logics with Enriched Language}, booktitle = {Handbook of Mathematical Fuzzy Logic - volume 2}, editor = {P. Cintula, P. H\'ajek, C. Noguera}, number = {38}, year = {2011}, pages = {627 - 711}, publisher = {College Publications}, chapter = {VIII}, address = {London}, ISBN = {978-1-84890-054-7 }, author = {Francesc Esteva and Llu\'{\i}s Godo and Enrico Marchioni} }