Porting the Pay with a (Group) Selfie (PGS) Payment System to Crypto Currency. - Ernesto Damiani; Perpetus Jacques Houngbo; Joël T. Hounsou; Rasool Asal; Stelvio Cimato; Fulvio Frati; Dina Shehada; Chan Yeob Yeun (AFRICATEK, 2017)

Pay-with-a-Selfie, a human-centred digital payment system. - Ernesto Damiani; Perpetus Jacques Houngbo; Rasool Asal; Stelvio Cimato; Fulvio Frati; Joël T. Hounsou; Dina Shehada; Chan Yeob Yeun (CoRR, 2017)

Embedding a Digital Wallet to Pay-with-a-Selfie, from Functional Requirements to Prototype. - Perpetus Jacques Houngbo; Joël T. Hounsou; Ernesto Damiani; Rasool Asal; Stelvio Cimato; Fulvio Frati; Chan Yeob Yeun (AFRICATEK, 2018)

Embedding a Digital Wallet to Pay-with-a-Selfie, Defining the System Architecture as Blockchain Based. - Perpetus Jacques Houngbo; Joël T. Hounsou; Ernesto Damiani; Rasool Asal; Stelvio Cimato; Fulvio Frati; Chan Yeob Yeun (AFRICATEK, 2018)