diff --git a/README.md b/README.md
index a8f6f05..59153bb 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 # Pollen3D
 Pollen3D is a multi-images 3D reconstruction software.
+if you use it, please consider citing this paper: [Autocalibration method for scanning electron microscope using affine camera model](https://link.springer.com/article/10.1007/s00138-020-01109-x#citeas).
 
 ## Dependencies
 - Install cmake:
@@ -39,4 +40,4 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>
 
-For more details see `lgpl-3.0.txt` or <http://www.gnu.org/licenses/lgpl-3.0.html>
+For more details see `lgpl-3.0.txt` or <http://www.gnu.org/licenses/lgpl-3.0.html>
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