Upto date tables with new references

It was noted to date that the references in the table are a few years old.

Should they be updated:

The impact of supplychaincomplexity on manufacturing plant performance http://www.sciencedirect.com/science/article/pii/S0272696308000570

Green supply-chain management: A state-of-the-art literature review

http://onlinelibrary.wiley.com/doi/10.1111/j.1468-2370.2007.00202.x/abstract;jsessionid=3B79DE25F4BFCC214A4710E3A2CE620E.d02t03?deniedAccessCustomisedMessage=&userIsAuthenticated=false