TY  - JOUR
AU  - asgari, heshmatolah
AU  - omidi, mohammadreza
AU  - malekinia, zahra
AU  - OMIDI, ALIAKBAR
TI  - Forecasting of  OPEC's Global Crude Oil Demand using Vector Self-Engagement Models, Collective Exploration and Gravitational Search
JO  - Future study Management
VL  - 29
IS  - 115
SP  - 101
EP  - 118
PY  - 2019
DO  - 
ER  -