Mahmood, Kashif; Chilwan, Ameen; Østerbø, Olav; Jarschel, Michael: 'Modelling of OpenFlow-based software-defined networks: the multiple node case', IET Networks, 2015, 4, (5), p. 278-284, DOI: 10.1049/iet-net.2014.0091 IET Digital Library, https://digital-library.theiet.org/;jsessionid=2luspf9mtagrs.x-iet-live-01content/journals/10.1049/iet-net.2014.0091