'README.md' ändern

README.md

@@ -89,7 +89,7 @@ Required dependencies to run the script Main_Plot_Figures.m:
 
 *  [Nix-mx v1.4.1](https://github.com/G-Node/nix-mx/)
 *  [Gramm](https://github.com/piermorel/gramm) [![DOI](http://joss.theoj.org/papers/10.21105/joss.00568/status.svg)](https://doi.org/10.21105/joss.00568)
-*  [FieldTrip](http://www.fieldtriptoolbox.org/download/) [![DOI](http://joss.theoj.org/papers/10.21105/joss.00568/status.svg)](https://doi:10.1155/2011/156869)
+*  [FieldTrip](http://www.fieldtriptoolbox.org/download/) [doi](https://doi:10.1155/2011/156869)
 
 
 ### Directory data_NIX