Hi Mukul, Mani,
Probably the last thing you want is another paper. I thought this one might be interesting for Mukul:
http://www.hrpub.org/download/20140105/CSIT8-13501666.pdf
Skim over it and/or feel free to ignore it.
On the other hand, these are the definitive references for Tabu Search written by Fred Glover. The first two are references in almost all the papers I have read:
http://leeds-faculty.colorado.edu/glover/TS%20-%20Part%20I-ORSA-aw.pdf
http://leeds-faculty.colorado.edu/glover/TS%20-%20Part%20II-ORSA-aw.pdf
http://www.cse.unt.edu/~garlick/teaching/4310/assign/TS%20-%20Tutorial.pdf
http://leeds-faculty.colorado.edu/glover/
I liked this into out wiki at:
https://github.com/pgRouting/pgrouting/wiki/VRP-Algorithms#tabu-search
-Steve