Amir, V., Seifi, H., Sepasian, S. M., yousefi, g. r. (2008). Combined Subtransmission Substation and Network Expansion Planning Using Genetic Algorithm, Ant Colony algorithm, and hybrid Ant Colony and Genetic Algorithm. *Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran*, 6(1), 3-14.