Suparti, B. . Warsito, . R. . Santoso, H. . Yasin, R. E. . Caraka, and Sudargo. “Biresponses Kernel Nonparametric Regression: Inflation and Economic Growth”. International Journal of Criminology and Sociology, vol. 10, Feb. 2021, pp. 465-71, doi:10.6000/1929-4409.2021.10.54.