diff --git a/paper/paper.md b/paper/paper.md
index efcef234..9bd71341 100644
--- a/paper/paper.md
+++ b/paper/paper.md
@@ -99,6 +99,7 @@ This work relies on the following main software packages (refer to [pyproject.to
 
 # Methods
 The methods validate input parameters to ensure data accuracy and prevent errors (refer to the [YAML file]([../aphylogeo/params.yaml](https://github.com/tahiri-lab/aPhyloGeo/blob/0889da4f2858320484db324e627e20b198703e5d/aphylogeo/params.yaml))).
+
 ## Tree Comparison
 
 In the comparison of phylogenetic trees, which are constructed based on genetic data, with climatic trees, a crucial step involves applying a phylogeography approach. This includes the utilization of Robinson and Foulds distance for topology evaluation and Least Squares distance for assessing branch length differences.