Özyeşil, M., Teker, D., Teker, S., & Korkmaz, A. N. (2026). Risk-adjusted optimization and diversification effects of cryptocurrencies in multi-asset portfolios: a simulation-based and copula-driven approach. Journal of Business Economics and Management, 27(4), 860–881. https://doi.org/10.3846/jbem.2026.28124