Dongsik Yoon Seong-Hwan Kim 0002 Dong-Ki Kang Chan-Hyun Youn Hybrid Workflow Management in Cloud Broker System. 145-155 2015 CloudComp https://doi.org/10.1007/978-3-319-38904-2_15 conf/cloudcomp/2015 db/conf/cloudcomp/cloudcomp2015.html#YoonKKY15