%0 Journal Article %A V. P. Kirlitsa %T $D$-optimal designs of experiments for trigonometric regression on interval with heteroscedastic observations %J Journal of the Belarusian State University. Mathematics and Informatics %D 2020 %P 80-85 %V 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/BGUMI_2020_3_a7/ %G ru %F BGUMI_2020_3_a7