Çetinkaya, C., Karaoglan, I., & Gökçen, H. (2013). Two-stage vehicle routing problem with arc time windows: A mixed integer programming formulation and a heuristic approach. European journal of operational research, 230(3), 539-550. https://doi.org/10.1016/j.ejor.2013.05.001
Chicago Style (17th ed.) CitationÇetinkaya, Cihan, Ismail Karaoglan, and Hadi Gökçen. "Two-stage Vehicle Routing Problem with Arc Time Windows: A Mixed Integer Programming Formulation and a Heuristic Approach." European Journal of Operational Research 230, no. 3 (2013): 539-550. https://doi.org/10.1016/j.ejor.2013.05.001.
MLA (9th ed.) CitationÇetinkaya, Cihan, et al. "Two-stage Vehicle Routing Problem with Arc Time Windows: A Mixed Integer Programming Formulation and a Heuristic Approach." European Journal of Operational Research, vol. 230, no. 3, 2013, pp. 539-550, https://doi.org/10.1016/j.ejor.2013.05.001.