“…Recently in [14], the authors have compared the results of their ILP formulation () with Greedy, MMAS and TS. Here, we compare our ILP formulation, i.e., with MMAS [4, 19, 20], TS [13] and [14]. As for the greedy algorithm, we have considered the improved greedy approach in [12] (henceforth labelled as Greedy).…”