List of Articles Open Access Article Abstract Page Full-Text 1 - Modeling and Simulation of the Bitcoin Price by the System Dynamics Method Roohollah Sharafian Ardekani Amir Daneshvar Mehdi Madanchi Zaj Fereydon Rahnamaroodposhti Open Access Article Abstract Page Full-Text 2 - Portfolio Optimization Problem Considering Cardinality and Bounding Constraints Using a Metaheuristic Algorithm Shohreh Zakaei Mohammadreza Sanaei Akbar Mirzapour Babajan