EDDY, T.; OPEN DARNIUS. Adjusting Anomalies in International Tourist Arrivals to North Sumatra During the Peak COVID-19 Period (April 2020 to June 2022) to Enhance the Validity of Time Series Modeling. Journal of Research in Mathematics Trends and Technology, [S. l.], v. 7, n. 2, p. 72–77, 2025. DOI: 10.32734/jormtt.v7i2.21718. Disponível em: https://talenta.usu.ac.id/jormtt/article/view/21718. Acesso em: 5 oct. 2025.