@article{SEMR_2021_18_2_a13,
     author = {A. P. Khramova and N. V. Maslova and V. V. Panshin and A. M. Staroletov},
     title = {Characterization of groups $E_6(3)$ and ${^2}E_6(3)$ by {Gruenberg--Kegel} graph},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {1651--1656},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2021_18_2_a13/}
}