Hasanah, N. A., Suciati, N. and Purwitasari, D. (2021) “Identifying Degree-of-Concern on COVID-19 topics with text classification of Twitters”, Register: Jurnal Ilmiah Teknologi Sistem Informasi, 7(1), pp. 50–62. doi: 10.26594/register.v7i1.2234.