“…This basic approach has been intensely studied in various other scenarios. For instance, Faliszewski et al [27] studied the problem of control where different types of attacks are combined (multimode control), Mattei et al [44] showed hardness of a variant of control which just exercises different tie-breaking rules, Bulteau et al [10] studied voter control in a combinatorial setting, etc [49,52,28,11,43,31,30,29,26,45,25,24,24,34,37,33,36,32,47,48,51,14,21,20,16,17,15].…”