@article{FAA_2021_55_1_a4,
     author = {S. M. Gusein-Zade and A.-M. Ya. Rauch},
     title = {On {Simple} ${\mathbb Z}_3${-Invariant} {Function} {Germs}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {56--64},
     publisher = {mathdoc},
     volume = {55},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2021_55_1_a4/}
}