TY - JOUR AU - Lari Dashtbayaz, Mahmoud AU - Mohammadi, Shaban AU - Naghshbandi, Nader TI - The Fuzzy Mean-Entropy Portfolio Model : Sensitivity Analysis, Transaction Costs Based on Credibility Theory JO - Journal of Investment Knowledge VL - 8 IS - 29 SP - 257 EP - 274 PY - 2019 DO - ER -