Using Different Threshold Value in Comparison Some of Methods Wavelet Estimation for Non Parametric Regression Function with Missing Data. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), [S. l.], v. 37, n. 1, p. 1–33, 2021. DOI: 10.55562/jrucs.v37i1.233. Disponível em: https://jrucs.iq/index.php/JAUCS/article/view/233. Acesso em: 26 jun. 2026.