add missing link

docs/source/how_to.md

@@ -7,19 +7,19 @@ starting without programming experience).
 This post is meant to help you with setting up your first experiment,
 based on the Berlin Emodb.
 
-1)  Set up python
+1) Set up python
 
-It's written in python, so first you have to set up a Python environment. 
-It is recommended to use Linux-based systems for easiness, but it should work on Windows as well. 
+It's written in python, so first you have to set up a Python environment.
+It is recommended to use Linux-based systems for easiness, but it should work on Windows as well.
 The current version of nkululeko is tested with Python 3.8.5.
 
-2)  Get a database
+2) Get a database
 
 Load the Berlin emodb database to some location on you harddrive, as
-discussed in this post. I will refer to the location as "emodb root"
+discussed in [this post](http://blog.syntheticspeech.de/2021/08/10/get-all-information-from-emodb/). I will refer to the location as "emodb root"
 from now on.
 
-3)  Install nkululeko
+3) Install nkululeko
 
 Inside your virtual environment, run:
 
@@ -28,7 +28,7 @@ Inside your virtual environment, run:
 This should install nkululeko and all required modules. It takes a long
 time and a lot of space, when done intially.
 
-5)  Adapt the ini file
+5) Adapt the ini file
 
 Use your favourite editor, e.g., Visual Studio code and edit the file
 that defines your experiment. You might start with this demo sample. You
@@ -42,7 +42,7 @@ this:
 
 An overview on all nkululeko options should be here.
 
-6)  Run the experiment
+6) Run the experiment
 
 Inside a shell type (or use VSC) and start the process with: