Hasan Hashim Ahmad Reda Alzighaibi Amaal Farag Elessawy Ibrahim Gad Hatem Abdul-Kader Asmaa H. Elsaid Securing Financial Transactions with a Robust Algorithm: Preventing Double-Spending Attacks. 171 2023 August 12 Comput. 9 https://doi.org/10.3390/computers12090171 db/journals/computers/computers12.html#HashimAEGAE23