%0 Journal Article %A Waldemar PopiƄski %T Least-squares trigonometric regression estimation %J Applicationes Mathematicae %D 1999 %P 121-131 %V 26 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-26-2-121-131/ %R 10.4064/am-26-2-121-131 %G en %F 10_4064_am_26_2_121_131