Update README.md

README.md

@@ -35,7 +35,7 @@ Perform personal calibration and remap the gaze target on a screen.
 [Command line arguments](https://github.molgen.mpg.de/perceptual/opengaze/wiki/Command-line-arguments)
 
 ## Citation
-If you use any of the resources provided on this page in any of your publications, please cite the following paper:
+**If you use any of the resources provided on this page in any of your publications, please cite the following paper:**
 
 **Evaluation of Appearance-Based Methods and Implications for Gaze-Based Applications** <br/>
 Xucong Zhang, Yusuke Sugano, Andreas Bulling<br/>