TY  - JOUR
AU  - Omidi, Hamed
AU  - vakilifard, hamedreza
TI  - Determining optimal portfolio using fuzzy goal programing based on black hole and hybrid algorithms, considering investors preferences
JO  - Financial Engineering and Portfolio Management
VL  - 10
IS  - 41
SP  - 26
EP  - 46
PY  - 2019
DO  - 
ER  -