J. V. Litamahuputty, E. G. Amiruddin, R. Rahim, A. Rahman, and Z. Mamadiyarov, “Cryptocurrency Risk Management through Decision Engineering: Evaluating XRPUSD and ADAUSD Portfolio Performance”, J. Appl. Sci. Eng. Technol. Educ., vol. 7, no. 1, pp. 69–81, Apr. 2025.