TIWARI, Bishwa Nath. A Note on Significance Tests in Quadratic Regression. Economic Journal of Nepal, [S. l.], v. 17, n. 4, p. 214–221, 1994. DOI: 10.3126/ejon.v17i4.71829. Disponível em: https://nepjol.info/index.php/EJON/article/view/71829. Acesso em: 23 feb. 2025.