[1] RMIT Univ, Coll Business & Law, 445 Swanston St, Melbourne, Vic 3000, Australia
[2] Tampere Univ, Kalevantie 4, Tampere 33100, Finland
[3] Singapore Univ Social Sci, 463 Clementi Rd, Singapore 599494, Singapore
[4] INESCTEC, P-4200465 Porto, Portugal