Santos, F.R.R.L., Ferreira, F.A.F. and Meidutė-Kavaliauskienė, I. (2018) “Perceived key determinants of payment instrument usage: a fuzzy cognitive mapping-based approach”, Technological and Economic Development of Economy, 24(3), pp. 950–968. doi:10.3846/20294913.2016.1261374.