"Ken Kobayashi,Yuichi Takano,Kazuhide Nakata","Cardinality-constrained distributionally robust portfolio optimization",,"European Journal of Operational Research",,"Vol. 309",,"pp. 1173-1182",2023,Jan. "Ken Kobayashi,Yuichi Takano,Kazuhide Nakata","Cardinality-constrained Distributionally Robust Portfolio Optimization","The seventh International Conference on Continuous Optimization (ICCOPT)",,,,,,2022,July