docs(report): add more citations

report/references.bib

@@ -115,3 +115,35 @@
   organization = {EthOS}
 }
 
+@misc{giuffre2026sentiment,
+  author       = {Giuffre, Steven},
+  title        = {What is Sentiment Analysis?},
+  year         = {2026},
+  month        = mar,
+  howpublished = {\url{https://www.vonage.com/resources/articles/sentiment-analysis/}},
+  note         = {Accessed: 2026-04-16},
+  organization = {Vonage}
+}
+
+@misc{mungalpara2022stemming,
+  author       = {Mungalpara, Jaimin},
+  title        = {Stemming Lemmatization Stopwords and {N}-Grams in {NLP}},
+  year         = {2022},
+  month        = jul,
+  day          = {26},
+  howpublished = {\url{https://jaimin-ml2001.medium.com/stemming-lemmatization-stopwords-and-n-grams-in-nlp-96f8e8b6aa6f}},
+  note         = {Accessed: 2026-04-16},
+  organization = {Medium}
+}
+
+@misc{chugani2025ethicalscraping,
+  author       = {Chugani, Vinod},
+  title        = {Ethical Web Scraping: Principles and Practices},
+  year         = {2025},
+  month        = apr,
+  day          = {21},
+  howpublished = {\url{https://www.datacamp.com/blog/ethical-web-scraping}},
+  note         = {Accessed: 2026-04-16},
+  organization = {DataCamp}
+}
+