Nabila Azi, Michel Gendreau, Jean-Yves Potvin: An exact algorithm for a 
single-vehicle routing problem with time windows and multiple routes. 
European Journal of Operational Research 178(3): 755-766 (2007)
http://www.inf.u-szeged.hu/~cimreh/timewindow.pdf

J. Brandao, A new tabu search algorithm for the vehicle routing problem 
with backhauls, 
European Journal of Operational Research
Volume 173, Issue 2, 1 September 2006, Pages 540-555 
http://www.inf.u-szeged.hu/~cimreh/backhauls.pdf

B. Crevier, J.F. Cordeau, G. Laporte
The multi-depot vehicle routing problem with inter-depot routes 
European Journal of Operational Research
Volume 176, Issue 2, 16 January 2007, Pages 756-773 
http://www.inf.u-szeged.hu/~cimreh/inter.pdf

I. Ellabiba, P. Calamaia and O. Basir
Exchange strategies for multiple Ant Colony System
Information Sciences
Volume 177, Issue 5, 1 March 2007, Pages 1248-1264 
http://www.inf.u-szeged.hu/~cimreh/multiant.pdf

F. Glover, N. Jozefowiez and M. Laguna
“Multi-objective Meta-heuristics for the Traveling Salesman Problem with 
Profits,” Journal of Mathematical Modelling and Algorithms, DOI 
10.1007/s10852-008-9080-2, 
http://spot.colorado.edu/~glover/publications.html (377.)

F. Glover, C. Rego, “Ejection Chain and Filter-and-Fan Methods in 
Combinatorial Optimization,” 4OR: A Quarterly Journal of Operations 
Research, 4(4), pp. 263-296, 2007
http://spot.colorado.edu/~glover/publications.html (366.) 

Sin C. Ho, M Gendreau, Path relinking for the vehicle routing problem
Journal of Heuristics, 	Volume 12, Numbers 1-2 / March, 2006
http://www.inf.u-szeged.hu/~cimreh/pathrelink.pdf

N. Katoh, T. Yano
An approximation algorithm for the pickup and delivery vehicle routing 
problem on trees
Discrete Applied Mathematics
Volume 154, Issue 16, 1 November 2006, Pages 2335-2349 
http://www.inf.u-szeged.hu/~cimreh/pickup.pdf

J. Lysgaard, The pyramidal capacitated vehicle routing problem,
European Journal of Operational Research
Volume 205, Issue 1, 16 August 2010, Pages 59-64,
http://www.inf.u-szeged.hu/~cimreh/pyramid.pdf

E. E. Zachariadis, C. D. Tarantilis, C. T. Kiranoudis,
A Guided Tabu Search for the Vehicle Routing Problem with
two-dimensional loading constraints,
European Journal of Operational Research 195 (2009) 729–743
http://www.inf.u-szeged.hu/~cimreh/twodimtabu.pdf