@article{SEMR_2021_18_1_a5,
     author = {N. T. Kogabaev},
     title = {On closure of configurations in freely generated projective planes},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {358--368},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2021_18_1_a5/}
}