PyPSA-eur/Clustering.md

@@ -23,7 +23,7 @@ This chapter was written and tested for the commit cfb979a0d0f037a24b9d916b72680
 It was an [issue](https://github.com/PyPSA/pypsa-eur/issues/124) there. The functionality has been last checked on 12.02.2021 on the PyPSA-eur master branch (commit df2425d4a04648e948d8291421cab7d2ca36529f, 14.01.2021).
 
 **The goal***
-The goal was to define a model with higher resolution for Germany ([nuts2](https://ec.europa.eu/eurostat/de/web/gisco/geodata/reference-data/administrative-units-statistical-units/nuts)) and limit modelling of neighbouring countries to a minimum. While the current solution is specific to Germany, it can easily be adapted to other countries.
+The goal was to define a model with higher resolution for Germany ([nuts2](https://ec.europa.eu/eurostat/de/web/gisco/geodata/reference-data/administrative-units-statistical-units/nuts), also see explanation of [nuts](https://de.wikipedia.org/wiki/NUTS:DE)) and limit modelling of neighbouring countries to a minimum. While the current solution is specific to Germany, it can easily be adapted to other countries.
 
 **The way**
 - Create a PyPSA-eur-network with desired config-settings (clustering.custom_busmap in the PyPSA-eur config file must be set to `false` at this step).