AHMED, H. Y.; HMOOD, M. Y. Comparison of Some Semi-parametric Methods in Partial Linear Single-Index Model. Journal of Economics and Administrative Sciences, [S. l.], v. 27, n. 130, p. 170–184, 2021. DOI: 10.33095/jeas.v27i130.2207. Disponível em: https://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/2207. Acesso em: 20 may. 2022.