Agustini Tripena, Niken Larasati, Agus Sugandha and Putri Raffikah (2024) “Fourier Series Estimator For Estimation of Birespon Nonparametric Regression Curves”, International Journal of Technology and Education Research, 2(03), pp. 184-212. doi: 10.63922/ijeter.v2i03.1320.