SDN & OpenFlow World Congress 2016
SDN NFV World Congress 2017
SDN NFV World Congress 2018
https://web.cvent.com/event/df893e22-97be-4b33-8d9e-63dadf28e58c/summary
SDN NFV World Congress 2019 https://www.sdxcentral.com/resources/events/sdn-nfv-world-congress-2019/