Update README.md

Author: MarcelBeining

README.md

@@ -1,6 +1,6 @@
 # TreeAdmin
 
-TreeAdmin is a small Matlab extension to the [TREES toolbox](www.treestoolbox.org). Its graphical user interface helps to view and categorize morphologies reconstructed with TREES toolbox.
+TreeAdmin is a small Matlab extension to the [TREES toolbox](www.treestoolbox.org). Its graphical user interface helps to view and categorize morphologies reconstructed with TREES toolbox. It is one of the tools used (and should be cited like this) for the paper [Beining M*, Jungenitz T*, Radic T, Deller T, Cuntz H, Jedlicka P, Schwarzacher SW: Adult-born dentate granule cells show a critical period of dendritic reorganization and are distinct from developmentally born cells. Brain Structure and Function 2017, 222(3):1427-1446.](https://link.springer.com/article/10.1007/s00429-016-1285-y)
 
 # Getting started
 
@@ -10,4 +10,4 @@ TreeAdmin is a small Matlab extension to the [TREES toolbox](www.treestoolbox.or
 
 # Licensing
 
-This software is under MIT license, that means it's absolutely free for any developer to build commercial and opensource software on top of it, but use it at your own risk with no warranties, as is.
+This software is under MIT license, that means it's absolutely free for any developer to build commercial and opensource software on top of it, but use it at your own risk with no warranties, as is.