Update references

latex/references/references.bib

@@ -24,10 +24,10 @@
     subtitle = {An Introduction},
     publisher = {Springer Cham},
     year = {2018},
-  edition   = {1--6}
+    edition ={1--6}
 }
 
-@article{hunter:2007,
+@article{hunter:2007:matplotlib,
   author = {Hunter, J. D.},
   title = {Matplotlib: A 2D graphics environment},
   journal = {Computing in Science \& Engineering},
@@ -60,7 +60,7 @@
     pages = {589--606}
 }
 
-@article{britannica:2023:matter,
+@online{britannica:2023:matter,
     author = {The Editors of Encyclopaedia Britannica},
     title = {matter},
     year = {2023},
@@ -76,12 +76,29 @@
     pages = {162--163}
 }
 
+@article{waskom:2021:seaborn,
+    author = {Michael L. Waskom},
+    title = {seaborn: statistical data visualization},
+    journal = {Journal of Open Source Software},
+    volume = {6},
+    number = {60},
+    publisher = {The Open Journal},
+    year = {2021},
+    doi = {10.21105/joss.03021},
+    url = {https://doi.org/10.21105/joss.03021},
+    pages = {3021}
+ }
 
-@article{rk4_method,
+@online{openmp:2018,
-    author = "Morten Hjorth-Jensen",
+    author = {OpenMP},
-    title = "Computational Physics, Lecture Notes Fall 2015",
+    title = {OpenMP Application Programming Interface},
-    journal = "Department of Physics, University of Oslo",
+    year = {2018},
-    year = "2015",
+    url = {https://www.openmp.org/wp-content/uploads/OpenMP-API-Specification-5.0.pdf},
-    chapter = "8.4",
+    urldate = {2023-10-22}
-    pages = "250--252",
+}
+
+@misc{penning:fig,
+    key = ,
+    url = {https://www.med.physik.uni-muenchen.de/research/nuclear-science/nuclear-masses/mlltrap/layout/traps/index.html}
+    note = {Configuration figure a}
 }