Set of instances used in the paper below:
Instances Solutions C++ file to read the instances
Reference
R. G. van Anholt, L. C. Coelho, G. Laporte, I. F. A. Vis, An inventory-routing problem with pickups and deliveries arising in the replenishment of automated teller machines, CIRRELT, CIRRELT-2013-71, 2013 [link]