feat: ✨ add white paper and doi

README.md

@@ -1,5 +1,7 @@
 # GBIF - Extinct
 
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.12599947.svg)](https://doi.org/10.5281/zenodo.12599947)
+
 <p align="center">
   <img width="180" height="180" src="/assets/icons/apple-touch-icon-180x180.png">
 </p>
@@ -46,6 +48,25 @@ Above the table you find a filter form. You can filter by taxon name, taxonomic
 - **Synonym**: The synonym of the taxon. Link redirecting to GBIF taxon page.
 - **Taxa**: The taxonomy of the taxon.
 
+## Reference and Citation
+
+You can download our white paper please see [gbif-extinct-white-paper](/assets/gbif-extinct-white-paper.pdf). If you use GBIF-Extinct in your research, please cite the following:
+
+> Oberreiter, H. und Duenser, A. (2024) „HannesOberreiter/gbif-extinct: v1.3.1“. Zenodo. doi: 10.5281/zenodo.12599948.
+
+```bibtex
+@software{oberreiter_2024_12599948,
+  author       = {Oberreiter, Hannes and Duenser, Anna},
+  title        = {HannesOberreiter/gbif-extinct: v1.3.1},
+  month        = jun,
+  year         = 2024,
+  publisher    = {Zenodo},
+  version      = {v1.3.1},
+  doi          = {10.5281/zenodo.12599948},
+  url          = {https://doi.org/10.5281/zenodo.12599948}
+}
+```
+
 ## Development
 
 The project is open-source and contributions are welcome [github.com/HannesOberreiter/gbif-extinct](https://github.com/HannesOberreiter/gbif-extinct). The project is written in Go and uses Echo as a web framework. HTMX, Tailwind CSS and templ are used to build the frontend. As database we use DuckDB as it can be deployed as binary inside the go application and offers fast self-joining queries.