Update app.py

app.py

@@ -107,7 +107,7 @@ css = '''
 with gr.Blocks(css=css) as demo:
   binary_matrixes = gr.State([])
   gr.Markdown('''## Control your Stable Diffusion generation with Sketches (_beta_)
-  A beta version demo of MultiDiffusion region-based generation using Stable Diffusion 2.1 model. To get started, draw your masks and type your prompts. More details in the [project page](https://multidiffusion.github.io).
+  A beta version demo of [MultiDiffusion](https://arxiv.org/abs/2302.08113) region-based generation using Stable Diffusion 2.1 model. To get started, draw your masks and type your prompts. More details in the [project page](https://multidiffusion.github.io).
   ''')
 
   if(is_shared_ui):