Create CITATION.md

CITATION.md

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+# Citing and logo
+
+## Citing pandas
+
+If you use *pandas* for a scientific publication, we would appreciate citations to the published software and one of the two given papers:
+
+- *pandas* version 1.0.1 published on Zenodo (please find us on Zenodo and replace with the citation for the version you are using)
+```
+@software{reback2020pandas,
+  author       = {The pandas development team},
+  title        = {pandas-dev/pandas: Pandas 1.0.1},
+  month        = feb,
+  year         = 2020,
+  publisher    = {Zenodo},
+  version      = {v1.0.1},
+  doi          = {10.5281/zenodo.3644238},
+  url          = {https://doi.org/10.5281/zenodo.3644238}
+}
+```
+
+- Data structures for statistical computing in python, McKinney, Proceedings of the 9th Python in Science Conference, Volume 445, 2010.
+```
+@inproceedings{mckinney2010data,
+    title={Data structures for statistical computing in python},
+    author={Wes McKinney},
+    booktitle={Proceedings of the 9th Python in Science Conference},
+    volume={445},
+    pages={51--56},
+    year={2010},
+    organization={Austin, TX}
+}
+```
+
+- pandas: a foundational Python library for data analysis and statistics, McKinney, Python for High Performance and Scientific Computing, Volume 14, 2011.
+```
+@article{mckinney2011pandas,
+    title={pandas: a foundational Python library for data analysis and statistics},
+    author={Wes McKinney},
+    journal={Python for High Performance and Scientific Computing},
+    volume={14},
+    year={2011}
+}
+```
+
+## Brand and logo
+
+When using the project name *pandas*, please use it in lower case, even at the beginning of a sentence.
+
+You can find the official *pandas* logos [here](https://pandas.io/about/citing.html).