Aris Leivadeas Matthias Falkner Ioannis Lambadaris Mohamed Ibnkahla George Kesidis Balancing Delay and Cost in Virtual Network Function Placement and Chaining. 433-440 2018 NetSoft https://doi.org/10.1109/NETSOFT.2018.8459956 conf/netsoft/2018 db/conf/netsoft/netsoft2018.html#LeivadeasFLIK18