You seem to be attempting to access an item that has been removed from the repository.
There is a later version of the item you are trying to access:
Imran, Arif and Salhi, Said and Wassan, Niaz A.
A variable neighborhood-based heuristic for the heterogeneous fleet vehicle routing problem.
European Journal of Operational Research, 197
ISSN 0377-2217 .
(The full text of this publication is not available from this repository)