“…In books [13,14], Bohner and Peterson introduce most basic concepts and definitions related with the theory of time scales. In [1,3,13,20,21,24,32,50], several mathematicians investigate new forms of dynamic inequalities. Řehák seems to be the first mathematician to have introduced a time-scale version of Hardy's inequality, by obtaining in 2005 a dynamic inequality that unifies inequalities (1) and (2).…”