TY - JOUR AU - Pirhayati, Fatemeh AU - Houshmand Negabi, Zahra TI - Investigating the Relationship between Company Diversification and Systematic Risk by Studying the Cash flow of Companies Listed on the Tehran Stock Exchange JO - Agricultural Marketing and Commercialization Journal VL - 8 IS - 1 SP - 11 EP - 21 PY - 2024 DO - ER -