diff --git a/README.md b/README.md
index f40c41d2..927c0a82 100644
--- a/README.md
+++ b/README.md
@@ -113,6 +113,13 @@ cat sample.log | grep ene
 
 For details, [see manual page](https://issp-center-dev.github.io/dsqss/manual/master/en/dla/tutorial/spindimer.html).
 
+## Paper
+
+We would appreciate if you cite the following article in your research with DSQSS,
+[Y. Motoyama, K. Yoshimi, A. Masaki-Kato, T. Kato, and N. Kawashima, Comput. Phys. Commun. 264, 107944 (2021)](https://www.sciencedirect.com/science/article/pii/S0010465521000692).
+
+The preprint is [arXiv:2007.11329](https://arxiv.org/abs/2007.11329).
+
 ## License
 ### License of DSQSS
 DSQSS is distributed under the GNU GPL v3.
diff --git a/doc/en/dsqss/about_dsqss.rst b/doc/en/dsqss/about_dsqss.rst
index 5f87a5be..2125bf9e 100644
--- a/doc/en/dsqss/about_dsqss.rst
+++ b/doc/en/dsqss/about_dsqss.rst
@@ -50,11 +50,11 @@ Collaborators
 License
 ****************
 - GNU General Public License (GPL)
-The users are kindly requested to acknowledge the usage of this software in their publication, if any, based on the software, and let the developers know its reference information.
+- The users are kindly requested to cite the following paper in their publication, if any, based on the software.
   
-.. topic:: Acknowledgment Sample
+.. topic:: Reference
 
-    Numerical results in the present paper were obtained by the quantum Monte Carlo program DSQSS(https://github.com/qmc/dsqss/wiki). This package is distributed under GNU General Public License version 3 (GPL v3) or later.
+    Y. Motoyama, K. Yoshimi, A. Masaki-Kato, T. Kato, and N. Kawashima, Comput. Phys. Commun. 264, 107944 (2021).
 
 Acknowledgment
 ****************
diff --git a/doc/jp/dsqss/about_dsqss.rst b/doc/jp/dsqss/about_dsqss.rst
index c85d8e40..4c0e5cf0 100644
--- a/doc/jp/dsqss/about_dsqss.rst
+++ b/doc/jp/dsqss/about_dsqss.rst
@@ -94,12 +94,11 @@ DSQSSは, 以下のサブシステム群から構成されています.
 ライセンス
 ****************
 - GNU General Public License (GPL)に基づきます. 
-- 利用のための必須条件ではありませんが, 利用実態を把握したいので, 科学計算などに使用した場合, 関連公表論文の書誌情報などをアプリケーション管理者までお知らせ下さることを希望します. また, 論文などによる成果公開に際して謝辞に記載していただければ幸いです. 
+- 利用のための必須条件ではありませんが, DSQSS を利用した論文を執筆した際には, 以下の文献を引いていただけると幸いです.
    
-.. topic:: Acknowledgment Sample
+.. topic:: Reference
 
-    Numerical results in the present paper were obtained by the quantum Monte Carlo program DSQSS(https://github.com/issp-center-dev/dsqss).
-    This package is distributed under GNU General Public License version 3 (GPL v3) or later. 
+  Y. Motoyama, K. Yoshimi, A. Masaki-Kato, T. Kato, and N. Kawashima, Comput. Phys. Commun. 264, 107944 (2021).
 
 
 謝辞