Prastyo, P. H., Sumi, A. S., Dian, A. W. and Permanasari, A. E. (2020) “Tweets Responding to the Indonesian Government’s Handling of COVID-19: Sentiment Analysis Using SVM with Normalized Poly Kernel”, Journal of Information Systems Engineering and Business Intelligence, 6(2), pp. 112–122. doi: 10.20473/jisebi.6.2.112-122.