@book{ VERDEGAY_DELGADO,

author = { JOSE LUIS VERDEGAY GALDEANO and MIGUEL DELGADO CALVO-FLORES } ,

title = { Approximate Reasoning Tools for Artificial Intelligence },

publisher = { Verlag TUV Rheinland },

address = { COLONIA , ALEMANIA },

year = { 1990 },

isbn = { 3-88585-776-6 },

}