diff --git a/doc/opencv.bib b/doc/opencv.bib
index 975630a18d..6045a8434d 100644
--- a/doc/opencv.bib
+++ b/doc/opencv.bib
@@ -1238,3 +1238,10 @@
   number={2},
   pages={117-135},
 }
+@inproceedings{forstner1987fast,
+  title={A fast operator for detection and precise location of distincs points, corners and center of circular features},
+  author={FORSTNER, W},
+  booktitle={Proc. of the Intercommission Conference on Fast Processing of Photogrammetric Data, Interlaken, Switzerland, 1987},
+  pages={281--305},
+  year={1987}
+}
diff --git a/modules/imgproc/include/opencv2/imgproc.hpp b/modules/imgproc/include/opencv2/imgproc.hpp
index bb6284b7b5..94883d1f57 100644
--- a/modules/imgproc/include/opencv2/imgproc.hpp
+++ b/modules/imgproc/include/opencv2/imgproc.hpp
@@ -1861,8 +1861,8 @@ CV_EXPORTS_W void preCornerDetect( InputArray src, OutputArray dst, int ksize,
 
 /** @brief Refines the corner locations.
 
-The function iterates to find the sub-pixel accurate location of corners or radial saddle points, as
-shown on the figure below.
+The function iterates to find the sub-pixel accurate location of corners or radial saddle
+points as described in @cite forstner1987fast, and as shown on the figure below.
 
 ![image](pics/cornersubpix.png)