%0 Journal Article %A V. P. Kirlitsa %T $D$- and $A$-optimal designs of experiments for trigonometric regression with heteroscedastic observations %J Journal of the Belarusian State University. Mathematics and Informatics %D 2023 %P 35-44 %V 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/BGUMI_2023_2_a3/ %G ru %F BGUMI_2023_2_a3