Pseudometrics Associated with Fuzzy Relations Having Weak Properties. - Pedro J. Burillo; León A. González (AAECC, 1987)

Correlation of interval-valued intuitionistic fuzzy sets. - Humberto Bustince; Pedro J. Burillo (Fuzzy Sets Syst., 1995)

Construction theorems for intuitionistic fuzzy sets. - Pedro J. Burillo; Humberto Bustince (Fuzzy Sets Syst., 1996)

Entropy on intuitionistic fuzzy sets and on interval-valued fuzzy sets. - Pedro J. Burillo; Humberto Bustince (Fuzzy Sets Syst., 1996)

Vague sets are intuitionistic fuzzy sets. - Humberto Bustince; Pedro J. Burillo (Fuzzy Sets Syst., 1996)

Structures on intuitionistic fuzzy relations. - Humberto Bustince; Pedro J. Burillo (Fuzzy Sets Syst., 1996)

Una estructura ordenada en operadores de la morfologia matematica. - Pedro J. Burillo; Noé Frago; Ramón Fuentes-González (EUSFLAT-ESTYLF Joint Conf., 1999)

Embedding some families of fuzzy relations in the class of fuzzy consequence operators. - Jorge Elorza; Pedro J. Burillo (EUSFLAT-ESTYLF Joint Conf., 1999)

Properties of the fuzzy compositions based on aggregation operators and its pseudocomplement. - Miren I. Portilla; Pedro J. Burillo (EUSFLAT-ESTYLF Joint Conf., 1999)

On the Relation Between Fuzzy Preorders and Fuzzy Consequence Operators. - Jorge Elorza; Pedro J. Burillo (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 1999)

Inclusion grade and fuzzy implication operators. - Pedro J. Burillo; Noé Frago; Ramón Fuentes-González (Fuzzy Sets Syst., 2000)

Mathematical analysis of interval-valued fuzzy relations: Application to approximate reasoning. - Humberto Bustince; Pedro J. Burillo (Fuzzy Sets Syst., 2000)

Properties of the fuzzy composition based on aggregation operators. - Miren I. Portilla; Pedro J. Burillo; M. L. Eraso (Fuzzy Sets Syst., 2000)

Compositions of Fuzzy Relations Based on Aggregation Operator and its Pseudocomplement. - Miren I. Portilla; Pedro J. Burillo (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2000)

On fuzzy orderings of crisp and fuzzy intervals. - Ramón Fuentes-González; Pedro J. Burillo; Gaspar Mayor (EUSFLAT Conf., 2001)

Perturbation of Intuitionistic Fuzzy Relations. - Humberto Bustince Sola; Pedro J. Burillo (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2001)

About Intuitionistic Fuzzy Implication Operators. - Humberto Bustince Sola; Pedro J. Burillo; Maria Victoria Mohedano Salillas (JCIS, 2002)

Automorphisms, negations and implication operators. - Humberto Bustince Sola; Pedro J. Burillo; F. Soria (Fuzzy Sets Syst., 2003)

Connecting fuzzy preorders, fuzzy consequence operators and fuzzy closure and co-closure systems. - Jorge Elorza; Pedro J. Burillo (Fuzzy Sets Syst., 2003)

On the relation between fuzzy closing morphological operators, fuzzy consequence operators induced by fuzzy preorders and fuzzy closure and co-closure systems. - Jorge Elorza; Ramón Fuentes-González; Jean Bragard; Pedro J. Burillo (Fuzzy Sets Syst., 2013)

Penalty Function in Optimization Problems: A Review of Recent Developments. - Humberto Bustince; Javier Fernández 002; Pedro J. Burillo (Soft Computing Based Optimization and Decision Models, 2017)