T-NOVA: A marketplace for virtualized network functions. - Georgios Xilouris; Eleni Trouva; Felicia Lobillo; João M. Soares; Jorge Carapinha; Michael J. McGrath; George Gardikis; Pietro Paglierani; Evangelos Pallis; Letterio Zuccaro; Yacine Rebahi; Anastasios Kourtis (EuCNC, 2014)