Dhivya M, Balamourougane R, Nithin J, R Velu Raj 2023. Unified Payment Interface: A Unique Payment Interface in the Universe- Secondary Data Analysis . European Economic Letters (EEL). 13, 3 (Jul. 2023), 1259–1267. DOI:https://doi.org/10.52783/eel.v13i3.423.