Add a reference to the published paper in the Readme

README.md

@@ -3,8 +3,19 @@ This Dune module provides a meta-grid for wrapping other grid implementations an
 a curved geometry on each element, parametrized by a [Dune-CurvedGeometry](https://gitlab.mn.tu-dresden.de/iwr/dune-curvedgeometry)
 class.
 
-For an overview about the CurvedGrid and the CurvedGeometry, see also the presentation
-[Dune-CurvedGrid - A Dune module for surface parametrization](http://wwwpub.zih.tu-dresden.de/~praetori/presentations/dune-curvedgrid).
+## How to Cite
+If you use dune-curvedgrid or dune-curvedgeometry, please cite the following [paper](https://journals.ub.uni-heidelberg.de/index.php/ans/article/view/75917/):
+
+```
+Simon Praetorius and Florian Stenger,
+Dune-CurvedGrid - A Dune module for surface parametrization,
+Archive of Numerical Software, vol. 6, no. 1, 2022, pages 1-27,
+DOI: 10.11588/ans.2022.1.75917
+```
+
+For an overview about the CurvedGrid and the CurvedGeometry, see also the
+[presentation](http://wwwpub.zih.tu-dresden.de/~praetori/presentations/dune-curvedgrid) given
+at the Institute of Scientific Computing at TU Dresden.
 
 ## Mirror
 This repositories is mirrored to https://gitlab.com/iwr/dune-curvedgrid.