J. Neggers, S. S. Ahn and H. S. Kim introduced in [10] the notion of
Q-algebra, as an algebra (X; ; *; e) satisfying (i), (ii) and(iv) (x * y) * z = (x * z) * y
for any x; y; z 2 X. It is easy to see that B-algebras and Q-algebras are different notions.
For example, X = {1; 2; 3} with* defined by the following table: