%0 Journal Article %A V. V. Plakhotnik %T Classification of matrix idempotents over a~subalgebra of $K[x]$ generated by monomials %J Sbornik. Mathematics %D 1988 %P 201-209 %V 61 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1988_61_1_a14/ %G en %F SM_1988_61_1_a14