Add bibtex entries for research publications (#904)

* Update Research.md

* Update website/docs/Research.md

Co-authored-by: Chi Wang <wang.chi@microsoft.com>

* Update website/docs/Research.md

Co-authored-by: Chi Wang <wang.chi@microsoft.com>

* Update website/docs/Research.md

Co-authored-by: Chi Wang <wang.chi@microsoft.com>

* Update website/docs/Research.md

Co-authored-by: Chi Wang <wang.chi@microsoft.com>

* Update website/docs/Research.md

Co-authored-by: Chi Wang <wang.chi@microsoft.com>

* Update website/docs/Research.md

Co-authored-by: Chi Wang <wang.chi@microsoft.com>

* Update website/docs/Research.md

Co-authored-by: Chi Wang <wang.chi@microsoft.com>

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Co-authored-by: Chi Wang <wang.chi@microsoft.com>
Co-authored-by: Qingyun Wu <qingyun.wu@psu.edu>