Liang Liu Hui Lei Dongjun Lan Raymond E. Rose J. S. Seymour Murthy V. Devarakonda Service Obligations Management in IT Outsourcing. 421-426 2007 ICEBE http://dx.doi.org/10.1109/ICEBE.2007.16 conf/icebe/2007 db/conf/icebe/icebe2007.html#LiuLLRSD07