Nordtank ref opdate

nordtank.md

@@ -64,7 +64,7 @@ The wind turbine is equipped with a data acquisition system for recording meteor
 - DOI               :   'https://doi.org/10.11583/DTU.16782598' 
 ## PUBLICATIONS	 
 
-1. [Online wind turbine measurement laboratory](./ts_wt/nordtank/Nordtank_paper.pdf)
+1. [Online wind turbine measurement laboratory](https://orbit.dtu.dk/files/2485403/paper0452.pdf)
 ## Public data
 1. Run statistics (NetCDF)
 2. Raw time series (appr. 35Hz) Nordtank.zip (zipped ascii files)