Why is management necessary?
What are the advantages and disadvantages of delegation?
Just as the brain coordinates the functions of the body, effective management is needed to coordinate the functions of a business to make it productive.
However, since this is not my area of expertise, I searched Google under "delegation management to get these possible sources:
http://www.see.ed.ac.uk/~gerard/Management/art5.html?http://oldeee.see.ed.ac.uk/~gerard/Management/art5.html
http://www.managementhelp.org/guiding/delegate/delegate.htm
http://www.contourconsulting.co.uk/Delegating.htm
http://www.laynetworks.com/OVERCOMING-WEAK-DELEGATION.html
http://www.montana.edu/legalcounsel/delegation_of_authority2005-8-12.htm
I hope this helps. Thanks for asking.