diff --git a/README.md b/README.md
index bb28323..812e5b8 100644
--- a/README.md
+++ b/README.md
@@ -170,23 +170,27 @@ bridge.test(test_data)
 
 ## References
 
-For more information about ABL, please refer to: [Zhou, 2019](https://link.springer.com/epdf/10.1007/s11432-018-9801-4?author_access_token=jgJe1Ox3Mk-K7ORSnX7jtfe4RwlQNchNByi7wbcMAY7_PxTx-xNLP7Lp0mIZ04ORp3VG4wioIBHSCIAO3B_TBJkj87YzapmdnYVSQvgBIO3aEpQWppxZG25KolINetygc2W_Cj2gtoBdiG_J1hU3pA==) and [Zhou and Huang, 2022](https://www.lamda.nju.edu.cn/publication/chap_ABL.pdf).
+For more information about ABL, please refer to: [Zhou, 2019](http://scis.scichina.com/en/2019/076101.pdf) and [Zhou and Huang, 2022](https://www.lamda.nju.edu.cn/publication/chap_ABL.pdf).
 
 ```latex
 @article{zhou2019abductive,
-  title={Abductive learning: towards bridging machine learning and logical reasoning},
-  author={Zhou, Zhi-Hua},
-  journal={Science China Information Sciences},
-  volume={62},
-  pages={1--3},
-  year={2019},
-  publisher={Science China Press}}
+  title     = {Abductive learning: towards bridging machine learning and logical reasoning},
+  author    = {Zhou, Zhi-Hua},
+  journal   = {Science China Information Sciences},
+  volume    = {62},
+  number    = {7},
+  pages     = {76101},
+  year      = {2019}
+}
 
 @incollection{zhou2022abductive,
-  title={Abductive Learning},
-  author={Zhou, Zhi-Hua and Huang, Yu-Xuan},
-  booktitle={Neuro-Symbolic Artificial Intelligence: The State of the Art},
-  pages={353--369},
-  year={2022},
-  publisher={IOS Press}}
+  title     = {Abductive Learning},
+  author    = {Zhou, Zhi-Hua and Huang, Yu-Xuan},
+  booktitle = {Neuro-Symbolic Artificial Intelligence: The State of the Art},
+  editor    = {Pascal Hitzler and Md. Kamruzzaman Sarker},
+  publisher = {{IOS} Press},
+  pages     = {353--369},
+  address   = {Amsterdam},
+  year      = {2022}
+}
 ```
\ No newline at end of file
diff --git a/docs/Overview/Abductive-Learning.rst b/docs/Overview/Abductive-Learning.rst
index 9fbe25f..9eb6ffe 100644
--- a/docs/Overview/Abductive-Learning.rst
+++ b/docs/Overview/Abductive-Learning.rst
@@ -57,7 +57,7 @@ is dual-driven by both data and domain knowledge, integrating and
 balancing the use of machine learning and logical reasoning in a unified
 model.
 
-For more information about ABL, please refer to: `Zhou, 2019 <https://link.springer.com/epdf/10.1007/s11432-018-9801-4?author_access_token=jgJe1Ox3Mk-K7ORSnX7jtfe4RwlQNchNByi7wbcMAY7_PxTx-xNLP7Lp0mIZ04ORp3VG4wioIBHSCIAO3B_TBJkj87YzapmdnYVSQvgBIO3aEpQWppxZG25KolINetygc2W_Cj2gtoBdiG_J1hU3pA==>`_ 
+For more information about ABL, please refer to: `Zhou, 2019 <http://scis.scichina.com/en/2019/076101.pdf>`_ 
 and `Zhou and Huang, 2022 <https://www.lamda.nju.edu.cn/publication/chap_ABL.pdf>`_.
 
 .. _abd:
diff --git a/docs/README.rst b/docs/README.rst
index c83deae..2287024 100644
--- a/docs/README.rst
+++ b/docs/README.rst
@@ -56,5 +56,5 @@ For Windows and Mac users, please refer to the `Swi-Prolog Install Guide <https:
 References
 ----------
 
-For more information about ABL, please refer to: `Zhou, 2019 <https://link.springer.com/epdf/10.1007/s11432-018-9801-4?author_access_token=jgJe1Ox3Mk-K7ORSnX7jtfe4RwlQNchNByi7wbcMAY7_PxTx-xNLP7Lp0mIZ04ORp3VG4wioIBHSCIAO3B_TBJkj87YzapmdnYVSQvgBIO3aEpQWppxZG25KolINetygc2W_Cj2gtoBdiG_J1hU3pA==>`_ 
+For more information about ABL, please refer to: `Zhou, 2019 <http://scis.scichina.com/en/2019/076101.pdf>`_ 
 and `Zhou and Huang, 2022 <https://www.lamda.nju.edu.cn/publication/chap_ABL.pdf>`_.
\ No newline at end of file
diff --git a/docs/References.rst b/docs/References.rst
index 85ad7e5..259b0a2 100644
--- a/docs/References.rst
+++ b/docs/References.rst
@@ -1,7 +1,7 @@
 References
 ==========
 
-Zhi-Hua Zhou. `Abductive learning: Towards bridging machine learning and logical reasoning. <https://link.springer.com/epdf/10.1007/s11432-018-9801-4?author_access_token=jgJe1Ox3Mk-K7ORSnX7jtfe4RwlQNchNByi7wbcMAY7_PxTx-xNLP7Lp0mIZ04ORp3VG4wioIBHSCIAO3B_TBJkj87YzapmdnYVSQvgBIO3aEpQWppxZG25KolINetygc2W_Cj2gtoBdiG_J1hU3pA==>`_. **Science China Information Sciences**, 2019, 62: 076101.
+Zhi-Hua Zhou. `Abductive learning: Towards bridging machine learning and logical reasoning. <http://scis.scichina.com/en/2019/076101.pdf>`_. **Science China Information Sciences**, 2019, 62: 076101.
 
 Zhi-Hua Zhou and Yu-Xuan Huang. `Abductive learning <https://www.lamda.nju.edu.cn/publication/chap_ABL.pdf>`_. In P. Hitzler and M. K. Sarker eds., **Neuro-Symbolic Artificial Intelligence: The State of the Art**, IOP Press, Amsterdam, 2022, p.353-379