“…It is, among other things, the theory of disordered diluted alloys [3,14,15], random field problems [15,16], amorphization [14,17,18] and surface magnetism [4,19]. In the equivalent, integral operator version, the method has been applied to studies of thin magnetic films [20,21]. At the same time, great efforts were put into application of H-K method to higher spins problem [22,23].…”