@article{IM2_2021_85_2_a4,
     author = {V. D. Sedykh},
     title = {On a~real caustic of type $E_6$},
     journal = {Izvestiya. Mathematics },
     pages = {279--305},
     publisher = {mathdoc},
     volume = {85},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2021_85_2_a4/}
}