diff --git a/article/paper.bib b/article/paper.bib
index 869e155..4836480 100644
--- a/article/paper.bib
+++ b/article/paper.bib
@@ -1,12 +1,12 @@
 @book{Moon2020,
-  title={Statistics for the Social Sciences: Moving Toward an Integrated Approach},
+  title={{Statistics for the Social Sciences: Moving Toward an Integrated Approach}},
   author={Simon M. Moon},
   isbn={978-1516519613},
   year={2020},
   publisher={Cognella Academic Publishing}
 }
 @article{Murtonen:2003,
-  title={Difficulties experienced by education and sociology students in quantitative methods courses},
+  title={{Difficulties experienced by education and sociology students in quantitative methods courses}},
   author={Murtonen, Mari and Lehtinen, Erno},
   journal={Studies in Higher education},
   volume={28},
@@ -17,7 +17,7 @@ @article{Murtonen:2003
   doi={10.1080/0307507032000058064}
 }
 @article{Virtanen:2020,
-  title={SciPy 1.0: fundamental algorithms for scientific computing in Python.},
+  title={{SciPy 1.0: fundamental algorithms for scientific computing in Python}},
   author={Virtanen, Pauli and Gommers, Ralf and Oliphant, Travis E and Haberland, Matt and Reddy, Tyler and Cournapeau, David and Burovski, Evgeni and Peterson, Pearu and Weckesser, Warren and Bright, Jonathan and others},
   journal={Nature methods},
   volume={17},
@@ -28,7 +28,7 @@ @article{Virtanen:2020
   doi={10.1038/s41592-019-0686-2}
 }
 @article{seabold:2010,
-  title={Statsmodels: Econometric and statistical modeling with Python},
+  title={{Statsmodels: Econometric and statistical modeling with Python}},
   author={Seabold, Skipper and Perktold, Josef},
   journal={Proceedings of the 9th Python in Science Conference},
   volume={57},
@@ -39,7 +39,7 @@ @article{seabold:2010
   doi={10.25080/Majora-92bf1922-011}
 }
 @article{vallat2018,
-  title={Pingouin: statistics in Python.},
+  title={{Pingouin: statistics in Python}},
   author={Vallat, Raphael},
   journal={Journal of Open Source Software},
   volume={3},