In this note, we point out that Theorem 3.1 as well as Theorem 3.5 in G.\,D.~\c{C}ayl{\i} and F. Kara\c{c}al (Kybernetika {\mi 53} (2017), 394--417) contains a superfluous condition. We have also generalized them by using closure (interior, resp.) operators.
uninorms, bounded lattices, closure operators, interior operators
03B52, 06B20, 03E72