%0 Journal Article %A Waldemar PopiƄski %T Orthogonal series regression estimators for an irregularly spaced design %J Applicationes Mathematicae %D 2000 %P 309-318 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-27-3-309-318/ %R 10.4064/am-27-3-309-318 %G en %F 10_4064_am_27_3_309_318