@article{INTO_2020_177_a1,
     author = {A. Al-Abayechi and \'A. Figula},
     title = {Geodesic vectors and flat totally geodesic subalgebras in nilpotent metric {Lie} algebras},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {10--23},
     publisher = {mathdoc},
     volume = {177},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2020_177_a1/}
}