Sari, Retno, and Ratih Yulia Hayuningtyas. “Particle Swarm Optimization-Based Support Vector Machine Method for Sentiment Analysis in OVO Digital Payment Applications”. JURNAL TEKNOLOGI DAN OPEN SOURCE 4, no. 2 (December 20, 2021): 232 - 239. Accessed January 31, 2025. https://ejournal.uniks.ac.id/index.php/JTOS/article/view/1776.