1. G. Andreatta, L. De Giovanni, P. Serafini, Scheduling pharmacy openings, in: Proceedings of ECCO 2012 - 25th Conference of European Chapter on Combinatorial Optimization, April 26–28, 2012, Antalya, Turkey.
2. G. Andreatta, L. De Giovanni, P. Serafini, Optimal Shift Partitioning of Pharmacies, 2013. Working paper.
3. O. Özpeynirci, E. Aǧlamaz, Mathematical Models for Pharmacy Duty Scheduling, in: Proceedings of ECCO 2012 - 25th Conference of European Chapter on Combinatorial Optimization, April 26–28, 2012, Antalya, Turkey.
4. The distance matrix of a graph and its tree realization;Patrinos;Quart. Appl. Math.,1972