@article{SEMR_2019_16_a136,
     author = {A. V. Greshnov},
     title = {Hyperspaces that satisfy $cc$-homogeneous cone condition on canonical {Heisenberg} and {Engel} groups},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {938--948},
     publisher = {mathdoc},
     volume = {16},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2019_16_a136/}
}