Update file README.md

README.md

@@ -5,7 +5,8 @@
 Developer Tjark Gröne: tgroene@physnet.uni-hamburg.de
 
 
-Part of this code uses PDFgetX3 from Bilinge group of the University of Colombia.
+Part of this code uses PDFgetX3 from Bilinge group of the University of Colombia. Inorder to use it get your license here:
+[Diffpy: PDFgetX3](https://www.diffpy.org/products/pdfgetx.html)
 
 ## License
 <p><a href="https://gitlab.rrz.uni-hamburg.de/koziej-lab/pair-distribution-function/pdf/flypdf">FlyPDF</a> © 2025 by <a rel="cc:attributionURL dct:creator" property="cc:attributionName" href="https://gitlab.rrz.uni-hamburg.de/bav1448">Tjark Gröne</a> associated with the University of Hamburg is licensed under <a href="https://www.gnu.org/licenses/agpl-3.0.de.html" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">GNU AGPLv3 <img height="14" style="height:22px!important;margin-left:30px;vertical-align:text-bottom;" src="https://www.gnu.org/graphics/agplv3-155x51.png" alt=""></a></p>