Rutkauskas, Aleksandras Vytautas, and Viktorija Stasytytė. “Optimal Portfolio Search Using Efficient Surface and Three-Dimensional Utility Function”. Technological and Economic Development of Economy 17, no. 2 (June 24, 2011): 291-312. Accessed February 7, 2025. https://mla.vilniustech.lt/index.php/TEDE/article/view/5324.