From 7defecb5d614d932062de00e875a5ca854857c94 Mon Sep 17 00:00:00 2001
From: LasNikas <niklas.neher@web.de>
Date: Tue, 4 Jun 2024 16:51:32 +0200
Subject: [PATCH] fix bug

---
 paper/paper.bib | 21 +--------------------
 paper/paper.md  |  2 +-
 2 files changed, 2 insertions(+), 21 deletions(-)

diff --git a/paper/paper.bib b/paper/paper.bib
index 6b315b2e6..561d91ddc 100644
--- a/paper/paper.bib
+++ b/paper/paper.bib
@@ -184,15 +184,7 @@ @article{Zhang:2021
   pages = {108066},
   year = {2021},
   issn = {0010-4655},
-  doi = {https://doi.org/10.1016/j.cpc.2021.108066}
-}
-
-@misc{Kratos,
-	title = {Kratos},
-	year = {2024},
-	publisher = {GitHub},
-	journal = {GitHub repository},
-	url = {https://github.com/KratosMultiphysics/Kratos}
+  doi = {10.1016/j.cpc.2021.108066}
 }
 
 @Article{Biriukov:2018,
@@ -205,17 +197,6 @@ @Article{Biriukov:2018
   doi       = {10.1093/mnras/sty3413}
 }
 
-@Article{Liu:2022,
-  author   = {Lu Liu and Jie Wu and Shunying Ji},
-  journal  = {Powder Technology},
-  title    = {DEM–SPH coupling method for the interaction between irregularly shaped granular materials and fluids},
-  year     = {2022},
-  issn     = {0032-5910},
-  pages    = {117249},
-  volume   = {400},
-  doi      = {https://doi.org/10.1016/j.powtec.2022.117249}
-}
-
 @article{Akinci:2013,
   author = {Akinci, Nadir and Akinci, Gizem and Teschner, Matthias},
   title = {Versatile surface tension and adhesion for SPH fluids},
diff --git a/paper/paper.md b/paper/paper.md
index 16f278985..3b57ce014 100644
--- a/paper/paper.md
+++ b/paper/paper.md
@@ -78,7 +78,7 @@ In TrixiParticles.jl, particles of a single particle-based method are grouped in
 The interaction between two particles is defined by the types of their systems. This approach makes it easy to support new methods and different physics
 by adding a new system and defining its pairwise interaction wth other systems.
 
-![Particles of two different systems $\mathcal{S}_1}$ and $\mathcal{S}_2}$ in a simulation domain. The black and gray dashed circles represent the search radii for neighbors of particles $a$ and $b$, respectively.\label{fig:systems}](systems.png){width=40%}
+![Particles of two different systems $\mathcal{S}_1$ and $\mathcal{S}_2$ in a simulation domain. The black and gray dashed circles represent the search radii for neighbors of particles $a$ and $b$, respectively.\label{fig:systems}](systems.png){width=40%}
 
 To illustrate this, \autoref{fig:systems} depicts particles within a simulation domain. The black particles belong to system $\mathcal{S}_1$ and the gray particles belong to system $\mathcal{S}_2$.
 In general, the force $f_a$ experienced by a particle $a$ is calculated as