Hesitant pythagorean fuzzy hamacher aggregation operators and their application to multiple attribute decision making

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@article{Lu2017HesitantPF, title={Hesitant pythagorean fuzzy hamacher aggregation operators and their application to multiple attribute decision making}, author={Mao Lu and Gui-Wu Wei and Fuad E. Alsaadi and Tasawar Hayat and Ahmed Alsaedi}, journal={Journal of Intelligent and Fuzzy Systems}, year={2017}, volume={33}, pages={1105-1117} }