The Psychology of BNPL: A Systematic Review of Impulsive Buying and Post-Purchase Regret (2018-2025). - Omar Munther Nusir; Che Aniza Che Wel; Siti Ngayesah Ab Hamid; Lamees Al-Zoubi; Ahmad Samed Al-Adwan (J. Theor. Appl. Electron. Commer. Res., 2026)