Added commands to main file and corrected the references

bachelorproject.tex

@@ -1,10 +1,34 @@
 \documentclass{usiinfbachelorproject}
 
+\usepackage[]{caption}
+\usepackage[]{url}
+\usepackage[]{subcaption}
+\usepackage[]{float}
+
+\usepackage{tikz}
+\usepackage{tkz-euclide}
+\usetikzlibrary{external,shapes,through}
+
+\tikzexternalize[prefix=figures/]
+\tikzstyle{none}=[]
+\input{./tikzs/styles.tikzstyles}
+
+\pgfdeclarelayer{nodelayer}
+\pgfdeclarelayer{edgelayer}
+\pgfsetlayers{edgelayer,nodelayer,main}
+
+\graphicspath{{../figures/}{./figures/}}
+
+
+\newcommand*{\figref}[1]{\figurename~\ref{#1}}
+
 \captionsetup{labelfont={bf}}
+% \newcommand{\diff}{\mathop{}\!\mathrm{d}}
+\newcommand{\diff}{\mathop{}\!\mathrm{d}}
 
 \author{Arnaud Fauconnet}
 
-\title{From flying balls to colliding polygons}
+\title{From Flying Balls to Colliding Polygons}
 \subtitle{2D Physics Engine: Rigid Body Simulation}
 \versiondate{\today}
 
@@ -13,6 +37,13 @@
 		Switzerland]{Prof.}{Antonio}{Carzaniga}
 \end{committee}
 
+\newcommand{\inputtikz}[2][1]{
+	\resizebox{#1 \textwidth}{!}{
+		\tikzsetnextfilename{#2}
+		\input{../tikzs/#2.tikz}
+	}
+}
+
 \abstract {
 	Physics engines are a fun and interesting way to learn about a lot of
 	different subjects. First the theoretical concepts, such as the equations

references.bib

@@ -1,17 +1,3 @@
-@misc{Cairo:Docs,
-  author = {Cairoglyphics},
-  title = {Cairo Documentation},
-  year = 2016,
-  url = {https://www.cairographics.org/documentation/},
-  urldate = {2023-03-10}
-}
-@misc{Cairo:Tutorial,
-  author = {Cairoglyphics},
-  title = {Cairo Tutorial},
-  year = 2012,
-  url = {https://www.cairographics.org/tutorial/},
-  urldate = {2023-03-10}
-}
 @article{collisions,
   author  = "Jiménez, Juan José and Segura, Rafael J. and Feito, Francisco R.",
   title   = "Efficient collision detection between 2D polygons",
@@ -27,10 +13,10 @@
   journal={WWW page},
   year={2001}
 }
-@article{jovanoski2008gilbert,
-  title={The Gilbert--Johnson--Keerthi (GJK) Algorithm},
-  author={Jovanoski, Davor},
-  journal={Department of Computer Science, University of Salzburg},
-  pages={13},
-  year={2008}
+@article{collision:resolution,
+    title = "Physics Part 3: Collision Response",
+    author = "Chris Hecker",
+    journal = "Game Developer Magazine",
+    year = 1997,
+    url = {http://www.chrishecker.com/images/e/e7/Gdmphys3.pdf},
 }