Update README.md

Author: vchuravy

README.md

@@ -24,8 +24,8 @@ Currently, the following backends are supported:
 [docs-stable-url]: https://juliagpu.github.io/KernelAbstractions.jl/stable
 [docs-latest-img]: https://img.shields.io/badge/docs-dev-blue.svg
 [docs-latest-url]: https://juliagpu.github.io/KernelAbstractions.jl/dev
-[doi-img]: https://zenodo.org/badge/DOI/10.5281/zenodo.15635193.svg
-[doi-url]: https://doi.org/10.5281/zenodo.15635193
+[doi-img]: https://zenodo.org/badge/DOI/10.5281/zenodo.4021259.svg
+[doi-url]: https://doi.org/10.5281/zenodo.4021259
 [codecov-img]: https://codecov.io/gh/JuliaGPU/KernelAbstractions.jl/branch/main/graph/badge.svg
 [codecov-url]: https://codecov.io/gh/JuliaGPU/KernelAbstractions.jl
 [ci-img]: https://github.com/JuliaGPU/KernelAbstractions.jl/actions/workflows/ci.yml/badge.svg?branch=main
@@ -37,3 +37,16 @@ License
 -------
 
 KernelAbstractions.jl is licensed under the [MIT license](LICENSE.md).
+
+Cite this package as
+--------------------
+
+```
+@software{Churavy_KernelAbstractions_jl,
+author = {Churavy, Valentin},
+license = {MIT},
+title = {{KernelAbstractions.jl}},
+url = {https://github.com/JuliaGPU/KernelAbstractions.jl}
+doi = {10.5281/zenodo.4021259},
+}
+```