@article{IM2_2022_86_5_a4,
     author = {V. L. Popov},
     title = {Group varieties and group structures},
     journal = {Izvestiya. Mathematics },
     pages = {903--924},
     publisher = {mathdoc},
     volume = {86},
     number = {5},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2022_86_5_a4/}
}