Quasi-copulas with quadratic sections in one variable. - José Antonio Rodríguez-Lallena; Manuel Úbeda-Flores (Kybernetika, 2008)

Kendall distribution functions and associative copulas. - Roger B. Nelsen; José Juan Quesada-Molina; José Antonio Rodríguez-Lallena; Manuel Úbeda-Flores (Fuzzy Sets Syst., 2009)

Some new characterizations and properties of quasi-copulas. - José Antonio Rodríguez-Lallena; Manuel Úbeda-Flores (Fuzzy Sets Syst., 2009)

New constructions of diagonal patchwork copulas. - Fabrizio Durante; José Antonio Rodríguez-Lallena; Manuel Úbeda-Flores (Inf. Sci., 2009)

Quasi-copulas and signed measures. - Roger B. Nelsen; José Juan Quesada-Molina; José Antonio Rodríguez-Lallena; Manuel Úbeda-Flores (Fuzzy Sets Syst., 2010)

Bivariate quasi-copulas and doubly stochastic signed measures. - Juan Fernández-Sánchez; José Antonio Rodríguez-Lallena; Manuel Úbeda-Flores (Fuzzy Sets Syst., 2011)