%0 Journal Article %A A. K. Dronov %A V. M. Kaplitskii %T On the existence of a~basis in a~complemented subspace of a~nuclear K\"othe space from class~$(d_1)$ %J Sbornik. Mathematics %D 2018 %P 1463-1481 %V 209 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2018_209_10_a2/ %G en %F SM_2018_209_10_a2