%0 Journal Article %A A. V. Kaplun %T Canonical representation of eiconals algebra of three-ray star %J Zapiski Nauchnykh Seminarov POMI %D 2021 %P 57-78 %V 506 %U http://geodesic.mathdoc.fr/item/ZNSL_2021_506_a6/ %G ru %F ZNSL_2021_506_a6