Ihsan, M., Benny Sukma Negara, and Surya Agustian. “LSTM (Long Short Term Memory) for Sentiment COVID-19 Vaccine Classification on Twitter”. Digital Zone: Jurnal Teknologi Informasi Dan Komunikasi, Vol. 13, no. 1, May 2022, pp. 79-89, doi:10.31849/digitalzone.v13i1.9950.