“…The literature on hemivariational inequalities has been significantly enlarged in the last forty years, mainly because of their multiple relevant applications to various fields, see monographs [33,37,44] for analysis of various classes of such inequalities, see e.g. [2][3][4][5][11][12][13][14]21,22,24,[26][27][28]30,32,34,43,47,49,51] .…”