Benchmark data for the Pollution Traveling Salesman Problem with Refueling, including 20 problem instances with up to 1000 customers and 25 fuel stations and with varying node coordinates, fuel prices, customer demand, and vehicle capacity.

Karakostas P. and Sifaleras A., "The pollution traveling salesman problem with refueling", to appear in Computers & Operations Research, Elsevier, Article ID 106661, 2024.

Benchmark data for the Multi-period Multi-commodity Fleet Size & Mix Pollution IRP under the consideration of EU driving and working hours regulations, including 15 problem instances with up to 15 customers, four product types, and five time periods.

Karakostas P. and Sifaleras A., "Modeling of sustainable integrated supply chains under the consideration of European Union regulations", to appear in Central European Journal of Operations Research, Springer, 2024.

Benchmark data for the economic lot sizing problem with product returns and recovery, including 108 instances with a planning horizon of 52 weeks per year. Solutions for all instances have been computed with i) Variable neighborhood search within 30 seconds, and ii) Gurobi optimizer v.5.6.2 within 1 hour resulting, however, to either optimal (highlighted cells in the spreadsheet file) or suboptimal solutions.

Sifaleras A., Konstantaras I., and Mladenović N., "Variable neighborhood search for the economic lot sizing problem with product returns and recovery", International Journal of Production Economics, Elsevier Ltd., Vol. 160, pp. 133-143, 2015.

Baloukas Th., Paparrizos K., and Sifaleras A., "An Animated Demonstration of the Uncapacitated Network Simplex Algorithm", INFORMS Transactions on Education, INFORMS, Vol. 10, No. 1, pp. 34-40, 2009.