Denysia D, Hidayat R. Modeling The Impact Analysis of The Covid-19 Pandemic On The Tourism Sector In Palopo City With A Nonparametric Regression Approach. Mathline [Internet]. 2023 Nov. 21 [cited 2025 Apr. 23];8(4):1333-44. Available from: https://mathline.unwir.ac.id/index.php/Mathline/article/view/499