“…Since then, a lot of papers devoted to the complexity of various classes of graphs were published. In particular, explicit formulae were derived for complete multipartite graphs [7,3], almost complete graphs [35], wheels [4], fans [12], prisms [5], ladders [27], Möbius ladders [28], lattices [29], anti-prisms [33], complete prisms [26] and for many other families. For the circulant graphs some explicit and recursive formulae are given in [37,38,39,40,41,42].…”