Systems of linear equations over a bounded chain. - Ketty Peeva (Acta Cybern., 1985)

Fuzzy acceptors for syntactic pattern recognition. - Ketty Peeva (Int. J. Approx. Reason., 1991)

Finite 𝕃-fuzzy machines. - Ketty Peeva (Fuzzy Sets Syst., 2004)

Finite 𝕃-Fuzzy Acceptors, Regular 𝕃-Fuzzy Grammars And Syntactic Pattern Recognition. - Ketty Peeva (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2004)

Fuzzy Relational Calculus - Theory, Applications and Software - Ketty Peeva; Yordan Kyosev (World Scientific, 2005)

Algorithm for Solving Max-product Fuzzy Relational Equations. - Ketty Peeva; Yordan Kyosev (Soft Comput., 2007)

Computing behavior of finite fuzzy machines - Algorithm and its application to reduction and minimization. - Ketty Peeva; Zlatko Zahariev (Inf. Sci., 2008)

Inverse problem resolution for min-probabilistic sum fuzzy relational equations - Method and algorithm. - Ketty Peeva (IEEE Conf. of Intelligent Systems, 2012)

Fuzzy Relational Equations - From Theory to Software and Applications. - Ketty Peeva (On Fuzziness (2), 2013)

Resolution of fuzzy relational equations - Method, algorithm and software with applications. - Ketty Peeva (Inf. Sci., 2013)

Intuitionistic Fuzzy Relational Equations in BL- B L - Algebras. - Ketty Peeva (Imprecision and Uncertainty in Information Representation and Processing, 2016)