Update README.md

README.md

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 🚀 **`heron-101`** is a Document Layout Analysis Model used in the [Docling project](https://github.com/docling-project/docling).
 
-📄 For an in-depth description of the model architecture, training datasets, and evaluation methodology, please refer to our technical report: **"Advanced Layout Analysis Models for Docling"**, Nikolaos Livathinos *et al.*, 
+📄 For an in-depth description of the model architecture, training datasets, and evaluation methodology, please refer to our technical report: **"Advanced Layout Analysis Models for Docling"**, Nikolaos Livathinos *et al.*, [🔗 https://arxiv.org/abs/2509.11720](https://arxiv.org/abs/2509.11720)
 
 
 ## Inference code example