Nazli Siasi Mohammed A. Jasim Aysegül Yayimli Nasir Ghani Service Function Chain Survivability Provisioning in Fog Networks. 1117-1128 2022 19 IEEE Trans. Netw. Serv. Manag. 2 https://doi.org/10.1109/TNSM.2021.3138968 db/journals/tnsm/tnsm19.html#SiasiJYG22