diff --git a/.gitignore b/.gitignore
index 7bbc71c..cd73329 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 __pycache__/
 *.py[cod]
 *$py.class
+.DS_Store
 
 # C extensions
 *.so
diff --git a/README.md b/README.md
index 6de1188..ad0c63d 100644
--- a/README.md
+++ b/README.md
@@ -44,3 +44,18 @@ Our model learns localized radiological findings as we imposed prior anatomical
 ## License
 
 This code is freely available only for research purpuses.
+
+## How to cite
+
+```
+@article{tiulpin2018automatic,
+  title={Automatic Knee Osteoarthritis Diagnosis from Plain Radiographs: A Deep Learning-Based Approach},
+  author={Tiulpin, Aleksei and Thevenot, J{\'e}r{\^o}me and Rahtu, Esa and Lehenkari, Petri and Saarakkala, Simo},
+  journal={Scientific reports},
+  volume={8},
+  number={1},
+  pages={1727},
+  year={2018},
+  publisher={Nature Publishing Group}
+}
+```
diff --git a/snapshots_knee_grading/.DS_Store b/snapshots_knee_grading/.DS_Store
deleted file mode 100644
index 4ad0f6c..0000000
Binary files a/snapshots_knee_grading/.DS_Store and /dev/null differ