Update paper.bib

paper/paper.bib

@@ -23,6 +23,15 @@ @article{devries2024
     year = {2024}
 }
 
+@book{ggplot2,
+    author = {Hadley Wickham},
+    title = {ggplot2: Elegant Graphics for Data Analysis},
+    publisher = {Springer-Verlag New York},
+    year = {2016},
+    isbn = {978-3-319-24277-4},
+    url = {https://ggplot2.tidyverse.org}
+  }
+
 @article{guidolin2024,
     author = {Guidolin, Carolina and Aerts, Sam and Agbeshie, Gabriel Kwaku and Akuffo, Kwadwo Owusu and Aydin, Sema Nur and Baeza Moyano, David and Bolte, John and Broszio, Kai and Cantarero-Garc{\'\i}a, Guadalupe and Didikoglu, Altug and Gonz{\'a}lez-Lezcano, Roberto Alonso and Joosten-Ma, Hongli and Melero-Tur, Sofia and Nilsson Tengelin, Maria and P{\'e}rez Guti{\'e}rrez, Mar{\'\i}a Concepci{\'o}n and Stefani, Oliver and Svensson, Ingemar and Udovicic, Ljiljana and Zauner, Johannes and Spitschan, Manuel},
     title = {Protocol for a prospective, multicentre, cross-sectional cohort study to assess personal light exposure},
@@ -128,6 +137,6 @@ @article{zauner2023
     author = {Zauner, Johannes and Udovicic, Ljiljana and Spitschan, Manuel},
     title = {Power analysis for personal light exposure measurements and interventions},
     journal = {Research Square},
-    doi = {https://doi.org/10.21203/rs.3.rs-3771881/v1},
+    doi = {10.21203/rs.3.rs-3771881/v1},
     year = {2023}
 }