[1]
D. Amelia, G. A. Budijono, A. N. Ghasani, D. N. Tagawa, and N. S. Aflaha, “Modeling ASEAN Tourist Visits to Indonesia Using Nonparametric Regression with Penalized Spline Estimator”, zeta, vol. 10, no. 2, pp. 113–122, Jul. 2026.