Muhammad, F., N. Mulyana Maghfur, and A. Voutama. “Sentiment Analysis Dataset on COVID-19 Variant News: Kumpulan Data Analisis Sentimen Pada Berita Varian COVID-19”. SYSTEMATICS, vol. 4, no. 1, Mar. 2022, pp. 382-91, doi:10.35706/sys.v4i1.6347.