Update README.md

README.md

@@ -13,10 +13,10 @@ This implementation is based on [Stable Diffusion 1.5](https://huggingface.co/st
 Inference uses the combined generation approach described in the ImageReFL paper.
 
 
-### Model Sources [optional]
+### Model Sources
 
-- **Repository:** [https://github.com/ControlGenAI/ImageReFL]
-- **Paper [optional]:** [https://arxiv.org/abs/2304.05977]
+- [**Repository**](https://github.com/ControlGenAI/ImageReFL)
+- [**Paper**](https://arxiv.org/abs/2304.05977)
 
 ## How to Get Started with the Model