e-wallet Prototypes. - Mia Olsen; Jonas Hedman; Ravi K. Vatrapu (DESRIST, 2011)

e-Wallet Properties. - Mia Olsen; Jonas Hedman; Ravi K. Vatrapu (ICMB, 2011)

Designing digital payment artifacts. - Mia Olsen; Jonas Hedman; Ravikiran Vatrapu (ICEC, 2012)