@conference {4232, title = {On some classical fragments of t-norm based fuzzy logics}, booktitle = {Information Processing and Management of Uncertainty in Knowledge-Based Systems IPMU 2006}, volume = {2}, year = {2006}, pages = {1596-1603}, author = {Rom{\`a} Adillon and Angel Garc{\'\i}a-Cerda{\~n}a and Ventura Verd{\'u}} }