@article{MZM_2023_114_6_a9,
     author = {Yu. N. Shteinikov},
     title = {Sets with {Extremal} {Product} {Property} and {Its} {Variations}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {922--930},
     publisher = {mathdoc},
     volume = {114},
     number = {6},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2023_114_6_a9/}
}