113 DAFTAR PUSTAKA Braca, J. et al. (1997) ‘A computerized approach to the New York City school bus routing problem’, IIE Transactions (Institute of Industrial Engineers), 29(8), pp. 693–702. doi: 10.1080/07408179708966379. Chen, D. S. et al. (1990) ‘A bus routing system for rural school districts’, Computers and Industrial Engineering, 19(1–4), pp. 322–325. doi: 10.1016/0360-8352(90)90131-5. Ellegood, W. A. et al. (2019) ‘School bus routing problem: Contemporary trends and research directions’, Omega (United Kingdom). Elsevier Ltd. doi: 10.1016/j.omega.2019.03.014. Euchi, J. and Mraihi, R. (2012) ‘The urban bus routing problem in the Tunisian case by the hybrid artificial ant colony algorithm’, Swarm and Evolutionary Computation. Elsevier, 2, pp. 15–24. doi: 10.1016/J.SWEVO.2011.10.002. Ezquerro Eguizábal, S. et al.