diff --git a/chapters/citations.tex b/chapters/citations.tex
index 68cf606..715b7d9 100644
--- a/chapters/citations.tex
+++ b/chapters/citations.tex
@@ -61,3 +61,6 @@ \section{著者-出版年制标注法}
 
 % 注意，参考文献列表中的每条文献在正文中都要被引用。这里只是为了示例。
 \nocite{*}
+
+\bibliographystyle{ustcthesis-numerical}
+\bibliography{bib/ustc}
diff --git a/chapters/floats.tex b/chapters/floats.tex
index 268b410..8169d3f 100644
--- a/chapters/floats.tex
+++ b/chapters/floats.tex
@@ -97,3 +97,8 @@ \section{算法环境}
 
 注意，我们可以在论文中插入算法，但是插入大段的代码是愚蠢的。
 然而这并不妨碍有的同学选择这么做，对于这些同学，建议用 \pkg{listings} 宏包。
+
+\cite{buseck2018subsolidus}
+
+\bibliographystyle{ustcthesis-numerical}
+\bibliography{bib/ustc}
diff --git a/chapters/intro.tex b/chapters/intro.tex
index 315de0f..823fba5 100644
--- a/chapters/intro.tex
+++ b/chapters/intro.tex
@@ -36,3 +36,8 @@ \section{脚注}
   nisi ut aliquip ex ea commodo consequat.
   Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore
   eu fugiat nulla pariatur.}
+
+\cite{baker1995future}
+
+\bibliographystyle{ustcthesis-numerical}
+\bibliography{bib/ustc}
diff --git a/main.tex b/main.tex
index 70e9beb..feb2af4 100644
--- a/main.tex
+++ b/main.tex
@@ -9,7 +9,7 @@
 % fontset     = windows | mac | ubuntu | fandol
 
 % 加载宏包、全部的配置
-\input{ustcsetup.tex}
+\include{ustcsetup}
 
 
 \begin{document}
@@ -18,26 +18,26 @@
 \copyrightpage
 
 \frontmatter
-\input{chapters/abstract.tex}
+\include{chapters/abstract}
 \tableofcontents
 % \listoffigures
 % \listoftables
-\input{chapters/notation.tex}
+\include{chapters/notation}
 
 \mainmatter
-\input{chapters/intro.tex}
-\input{chapters/floats.tex}
-\input{chapters/math.tex}
-\input{chapters/citations.tex}
+\include{chapters/intro}
+\include{chapters/floats}
+\include{chapters/math}
+\include{chapters/citations}
 
-\bibliography{bib/ustc}  % 参考文献使用 BibTeX 编译
+% \bibliography{bib/ustc}  % 参考文献使用 BibTeX 编译
 % \printbibliography       % 参考文献使用 BibLaTeX 编译
 
 \appendix
-\input{chapters/complementary.tex}
+\include{chapters/complementary}
 
 \backmatter
-\input{chapters/acknowledgements.tex}
-\input{chapters/publications.tex}
+\include{chapters/acknowledgements}
+\include{chapters/publications}
 
 \end{document}
diff --git a/ustcsetup.tex b/ustcsetup.tex
index 0ee1b6b..dc7011a 100644
--- a/ustcsetup.tex
+++ b/ustcsetup.tex
@@ -51,8 +51,9 @@
 
 % 参考文献使用 BibTeX + natbib 宏包
 % 顺序编码制
-\usepackage[sort]{natbib}
+\usepackage[sort, sectionbib]{natbib}
 \bibliographystyle{ustcthesis-numerical}
+\usepackage{chapterbib}
 
 % 著者-出版年制
 % \usepackage{natbib}