On the syntactico-semantical completeness of first-order fuzzy logic. II. Main results Vilém Novák (1990) Kybernetika
On the syntactico-semantical completeness of first-order fuzzy logic. I. Syntax and semantics Vilém Novák (1990) Kybernetika
On the α -superposition of functions of a k -valued logic. Shabunin, A.L. (2007) Sibirskij Matematicheskij Zhurnal