diff --git a/structure.tex b/structure.tex
index 82050c6..d70440e 100644
--- a/structure.tex
+++ b/structure.tex
@@ -7,6 +7,7 @@
 \usepackage{listings}
 \usepackage{color}
 \usepackage{graphicx}
+\usepackage[numbers,square,sectionbib,comma,nonamebreak,elide]{natbib}
 \usepackage{float}
 \usepackage[english]{babel}
 \usepackage{fancyhdr}
@@ -17,7 +18,10 @@
 \usepackage{varwidth}
 \usepackage{enumitem}
 \usepackage{titlepic}
+\usepackage[nottoc]{tocbibind}
+\usepackage{url}
 
+\bibliographystyle{unsrtnat} % styles list https://www.sharelatex.com/learn/Natbib_bibliography_styles
 
 \geometry{a4paper,margin=2cm}
 \setlength{\columnsep}{1.5cm}