“…The main keywords used in the articles published in the research area by country are "financial management", "financial transaction tax", "financial services", "blockchain", "financial market", "financial crisis", "money laundering", "globalization", "financial data processing", "investments", "network security", "risk assessment", "tax system", "Tobin tax", "bitcoin", "data mining", "biometric", "electronic money", "cryptography", "game theory", "mathematical models", "artificial intelligence", and "financial regulation". The main terms of the articles on financial transactions relate primarily to the risk of global financial operations, security of money laundering, current and future credit mechanisms, auditing, the management of financial resources and the position of liquidity, and financial assistance to low-income countries [34,124,125]. Figure 7 shows the evolution of each group of countries during the period analyzed, 1935-2019.…”