adding Qiskit BibTeX reference
@@ -184,6 +184,8 @@ folders of the [qiskit-tutorials GitHub Repository](https://github.com/Qiskit/qi
Qiskit Chemistry was inspired, authored and brought about by the collective work of a team of researchers.
Aqua continues to grow with the help and work of [many people](./CONTRIBUTORS.rst), who contribute
to the project at different levels.
+If you use Qiskit, please cite as per the included
+[BibTex file](https://github.com/Qiskit/qiskit/blob/master/Qiskit.bib).
## License
