@article{zhu_singh_2016,  title={THE IMPACTS OF OIL PRICE VOLATILITY ON STRATEGIC INVESTMENT OF OIL COMPANIES IN NORTH AMERICA, ASIA, AND EUROPE},  volume={36},  ISSN={0101-7438},  url={https://doi.org/10.1590/0101-7438.2016.036.01.0001},  DOI={10.1590/0101-7438.2016.036.01.0001},  number={1},  journal={Pesquisa Operacional},  publisher={Sociedade Brasileira de Pesquisa Operacional},  author={Zhu, Qianqian and Singh, Gurcharan},  year={2016},  month={Jan},  pages={1–21} }