Update README.md with submodule step

README.md

@@ -36,6 +36,8 @@ In a nutshell, semba-fdtd capabilities are
 
 ## Running from release
 
+It is important to point out the repository has dependencies which are available as submodules. It is necessary to run `git submodule init` and `git submodule update` from the root folder before running any `cmake` or `build` commands.
+
 ### Windows
 
 Install intel runtime libraries: https://www.intel.com/content/www/us/en/developer/articles/tool/oneapi-standalone-components.html
@@ -69,4 +71,4 @@ https://doi.org/10.1109/NEMO.2017.7964255.
 
 - Guadalupe Gutierrez Gutierrez, Daniel Mateos Romero, Miguel Ruiz Cabello, Enrique Pascual-Gil, Luis Diaz Angulo, David Garcia Gomez, Salvador Gonzalez Garcia, 
 *On the Design of Aircraft Electrical Structure Networks*, 
-IEEE Transactions on Electromagnetic Compatibility. 2016. https://doi.org/10.1109/TEMC.2016.2514379.
+IEEE Transactions on Electromagnetic Compatibility. 2016. https://doi.org/10.1109/TEMC.2016.2514379.