List of Articles بهره¬وری کسب¬و¬کارها Open Access Article Abstract Page Full-Text 1 - Developing a Model and Identifying the Factors Influencing the Emergence of Black Holes in Human Resources in order to Improve the Productivity of Companies using Fuzzy Cognitive Map Seyedeh Maryam Mousavi Zadeh Mohammad Hakkak Mohsen Arefnezhad 10.83050/jpm.2024.11258602