%0 Journal Article %A A. F. Vakulenko %T On expansions over harmonic polynomial products inĀ ${\mathbb R}^3$ %J Zapiski Nauchnykh Seminarov POMI %D 2021 %P 36-42 %V 506 %U http://geodesic.mathdoc.fr/item/ZNSL_2021_506_a4/ %G ru %F ZNSL_2021_506_a4