2021. Sliced Inverse Regression (SIR) via group lasso. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ). 46, 1 (Oct. 2021), 505–512. DOI:https://doi.org/10.55562/jrucs.v46i1.101.