@article{ZNSL_2021_506_a6,
     author = {A. V. Kaplun},
     title = {Canonical representation of eiconals algebra of three-ray star},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {57--78},
     publisher = {mathdoc},
     volume = {506},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2021_506_a6/}
}