diff --git a/README.md b/README.md
index 6836428..de2ecc9 100644
--- a/README.md
+++ b/README.md
@@ -60,11 +60,13 @@ twine upload dist/*
 
 # References
 In this chapter I add at least a link for each of the knowledge needed for develop this project.
-* python
-* git
+* [python](https://www.python.org/): programming language for develop the tool
+* [HTML](https://www.w3schools.com/html/): markup language for the output file generated by the tool
+* [JavaScript](https://www.w3schools.com/js/): programming language used into the HTML for logic implementation 
+* [mustache](https://www.elated.com/easy-html-templates-with-mustache/): sintax for dynamic templating ( exist [pymustache](https://github.com/lotabout/pymustache) but I use a custom function with same sintax because of it does not work into js inside html)
+* [git](https://git-scm.com/doc): tool used for version control
 * [how to write a setup.py](https://medium.com/@joel.barmettler/how-to-upload-your-python-package-to-pypi-65edc5fe9c56)
-* python test
-* coverage
-* gitlab ci/cd
-* three.js
-* [pymustache](https://github.com/lotabout/pymustache): for using html template, but in the end I use replace with similar sintax
+* [unittest](https://docs.python.org/3/library/unittest.html): the used python framework for test automation
+* [coverage.py](https://coverage.readthedocs.io/en/6.1.2/): lib used for code coverage computation
+* [gitlab ci/cd](https://docs.gitlab.com/ee/ci/quick_start/): for run the integration test
+* [three.js](https://threejsfundamentals.org/): js lib to open and visualize 3D model