1. Afiqah Muhamad Jamil, S., Asrul Affendi Abdullah, M., Kek, S.L., Nor, M.E., Mohamed, M., Ismail, N.: Detecting overdispersion in count data: a zero-inflated Poisson regression analysis. J. Phys. Conf. Ser. 890, 012170 (2017)
2. Mustain, R., Vita, R., Nyoman, B.I.: Estimation of matrix variance-covariance on nonparametric regression spline truncated for longitudinal data. J. Phys. Conf. Ser. 1562, 012014 (2019)
3. Prahutama, A.: Model Regresi Nonparametrik Polynomial Lokal Birespon Pada Data Longitudinal Tesis. Institut Teknologi Sepuluh Nopember, Surabaya (2013)
4. Suparti, Santoso, R., Prahutama, A., Devi, A.R., Sudargo: Modeling longitudinal data based on Fourier regression. J. Phys. Conf. Ser. 1217, 012105 (2019)
5. Drapper, N.R., Smith, H.: Applied Regression Analysis 2. Marcel Dekker, New York (1992)