TY - JOUR AU - Reichel, Lothar AU - Ye, Qiang TI - Simple square smoothing regularization operators JO - Electronic transactions on numerical analysis PY - 2009 VL - 33 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ETNA_2009__33__a7/ LA - en ID - ETNA_2009__33__a7 ER -