It's Hard to Share: Joint Service Placement and Request Scheduling in Edge Clouds with Sharable and Non-Sharable Resources - He, Ting; Khamfroush, Hana; Wang, Shiqiang; La Porta, Tom; Stein, Sebastian (2018 IEEE 38th International Conference on Distributed Computing Systems (ICDCS), Distributed Computing Systems (ICDCS), 2018 IEEE 38th International Conference on, ICDCS, 2018)