Kristina, S., Sianturi, R. and Wijaya, V.J. 2020. Pengembangan Algoritma Ant Colony System Pada Heterogeneous Vehicle Routing Problem with Soft Time Window. Journal of Integrated System. 3, 2 (Dec. 2020), 85–102. DOI:https://doi.org/10.28932/jis.v3i2.2839.