diff --git a/docs/2-sampleserver/0-sample-python-base-code-gRPC/index.md b/docs/2-sampleserver/0-sample-python-base-code-gRPC/index.md
index 3e5e051..af08f45 100644
--- a/docs/2-sampleserver/0-sample-python-base-code-gRPC/index.md
+++ b/docs/2-sampleserver/0-sample-python-base-code-gRPC/index.md
@@ -139,4 +139,4 @@ You can modify the rpc port by adding the argument `--rpc-port [VALUE]`, where t
 ## Citation
 
 - [Cross Language Soccer Framework](https://arxiv.org/pdf/2406.05621)
-- Zare, N., Sayareh, A., Sadraii, A., Firouzkouhi, A. and Soares, A., 2024. Cross Language Soccer Framework: An Open Source Framework for the RoboCup 2D Soccer Simulation. arXiv preprint arXiv:2406.05621.
\ No newline at end of file
+- Zare, N., Sayareh, A., Sadraii, A., Firouzkouhi, A. and Soares, A., 2024. Cross Language Soccer Framework: An Open Source Framework for the RoboCup 2D Soccer Simulation. arXiv preprint arXiv:2406.05621....