Using Different Threshold Value in Comparison Some of Methods Wavelet Estimation for Non Parametric Regression Function with Missing Data. (2021). Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), 37(1), 1-33. https://doi.org/10.55562/jrucs.v37i1.233