“…Furthermore, many hybrid forms have been implemented, such as a scatter search algorithm with a path re-linking methodology in [26], a hybrid Ant Colony Optimization and Scatter Search (ACOSS) in [27], a Tabu Search (TS) with scatter search implemented by [28], as well as a neuro-genetic approach, which is a hybrid of GA and a neural network, proposed by [29], and more recently, ANGEL, a hybrid that combines ANt colony, GEnetic algorithm and Local search can be found in [30]. Finally, the newest meta-heuristic implementations can be found, including Differential Evolution (DE) [31], Artificial Immune System (AIS) [32] and, most recently, Estimation of Distribution Algorithm (EDA) [33], the shuffled frog-leaping algorithm (SFLA) [34], a hybrid EDA with a new local search based on a random walk and the delete-then-insert operator proposed by [35] along with the use of a discrete version of the ABC algorithm in [36] and an implementation of a discrete cuckoo search in [37].…”