Zeimpekis, V., Minis, I., Mamassis, K. and Giaglis, G.M.
In Dynamic Fleet Management: Concepts, Systems, Algorithms & Case Studies
Springer- Verlag, Chapter 9, 2007, 197 – 217.

Minis, I. and Ampazis, N.
Nature Inspired Computing, Idea Group, Volume II, 589 – 607, 2006.