@conference {4685, title = {Towards a Fuzzy Extension of the L{\'o}pez de M{\'a}ntaras Distance}, booktitle = {IPMU 2012}, volume = {297}, year = {2012}, pages = {81-90}, author = {Eva Armengol and Pilar Dellunde and Angel Garc{\'\i}a-Cerda{\~n}a} }