diff --git a/bibliography.bib b/bibliography.bib
index 92e69db..aa96b90 100644
--- a/bibliography.bib
+++ b/bibliography.bib
@@ -3041,6 +3041,24 @@
   file = {/home/charlotte/sync/Zotero/storage/BGEJXIYU/Smart and Cappel - 2006 - Students’ Perceptions of Online Learning A Compar.pdf}
 }
 
+@incollection{soaresCodeflexExperienceCompetitive2023,
+  title = {Codeflex 2.0: {{Experience With Competitive Programming}} in {{Logical}} and {{Functional Paradigms}}},
+  shorttitle = {Codeflex 2.0},
+  booktitle = {Internet of {{Behaviors Implementation}} in {{Organizational Contexts}}},
+  author = {Soares, Jos{\'e} M. and Brito, Miguel and Gon{\c c}alves, Celestino},
+  year = {2023},
+  pages = {40--67},
+  publisher = {{IGI Global}},
+  doi = {10.4018/978-1-6684-9039-6.ch003},
+  url = {https://www.igi-global.com/chapter/codeflex-20/www.igi-global.com/chapter/codeflex-20/333551},
+  urldate = {2023-12-01},
+  abstract = {This work presents the design and implementation of Codeflex, a web-based platform and repository of programming problems, that enables the learning and practice of competitive programming in multiple programming language paradigms. The Codeflex programming platform performs automatic evaluation of...},
+  copyright = {Access limited to members},
+  isbn = {978-1-66849-039-6},
+  langid = {english},
+  file = {/home/charlotte/sync/Zotero/storage/NFTCCUDI/Soares et al. - 2023 - Codeflex 2.0 Experience With Competitive Programm.pdf}
+}
+
 @inproceedings{sorourStudentPerformanceEstimation2015,
   title = {Student {{Performance Estimation Based}} on {{Topic Models Considering}} a {{Range}} of {{Lessons}}},
   booktitle = {Artificial {{Intelligence}} in {{Education}}},