Isnaini, B., Isnandar Slamet, Sulandari, W., & Khoirunissa, H. A. (2026). Exploring Spatial Nonstationarity in the Number of Motor Vehicles in East Java Using Robust Geographically Weighted Regression with an MM-Estimator. PYTHAGORAS Jurnal Matematika Dan Pendidikan Matematika, 20(2). https://doi.org/10.21831/pythagoras.v20i2.90866