“…This was done much later, first by Hadwiger [21] for n = 3, and then by Dinghas [7] for arbitrary dimension. Although it is a hard work to obtain some Bonnesenstyle inequalities in higher dimensional space, mathematicians are still working on finding unknown invariants of geometric significance (see [9,10,18,20,22,25,31,32,35,38,39,40,41,42,43,44,45,46,47,48]). …”